Top 10 Wheel Sealants (Spray)

Your wheels take a beating every single day. While you’re focused on perfecting that paint correction or maintaining a swirl-free finish, your rims are silently waging war against brake dust, road salt, tar, and iron particles that bake onto their surface at temperatures exceeding 400°F. It’s a brutal environment that regular car wax simply can’t survive. This is where wheel sealants—specifically spray formulations—have revolutionized how enthusiasts protect their investments. Unlike traditional paste waxes that require tedious application in tight spokes, modern spray sealants deliver professional-grade protection with minimal effort, creating a sacrificial barrier that repels contaminants and makes maintenance washes almost effortless.

But not all spray wheel sealants are created equal. The market has exploded with options ranging from polymer-based sprays to SiO2-infused ceramic formulations, each promising varying degrees of durability, heat resistance, and hydrophobic performance. Understanding the technology behind these products, the application nuances that separate mediocre results from show-car perfection, and the critical features that actually matter will transform how you approach wheel care forever. Let’s dive deep into everything you need to know before choosing your next wheel protection solution.

Top 10 Wheel Sealant Spray

CERAKOTE® Platinum Rapid Ceramic Paint Sealant Spray - 14 oz Bottle - Maximum Gloss & Shine – Extremely Hydrophobic – Unmatched Slickness - Ceramic Spray Coating - 50 Wash RatingCERAKOTE® Platinum Rapid Ceramic Paint Sealant Spray - 14 oz Bottle - Maximum Gloss & Shine – Extremely Hydrophobic – Unmatched Slickness - Ceramic Spray Coating - 50 Wash RatingCheck Price
GYEON Wet Coat 500ml - Hydrophobic Ceramic Spray Coating for Cars - High Gloss Solutions for Your Car Paint Wheels and Glass - Spray On Rinse Off Easy DIY Use FormulaGYEON Wet Coat 500ml - Hydrophobic Ceramic Spray Coating for Cars - High Gloss Solutions for Your Car Paint Wheels and Glass - Spray On Rinse Off Easy DIY Use FormulaCheck Price
Chemical Guys HydroSpin Wheel & Rim Ceramic Coating and Quick Detailer - 16 oz Spray Protects Wheels, Rims, and Brake Parts with Hydrophobic Ceramic Shine - Safe for Cars, Trucks, SUVs, MotorcyclesChemical Guys HydroSpin Wheel & Rim Ceramic Coating and Quick Detailer - 16 oz Spray Protects Wheels, Rims, and Brake Parts with Hydrophobic Ceramic Shine - Safe for Cars, Trucks, SUVs, MotorcyclesCheck Price
Rust-Oleum 366439 High Performance Wheel Spray Paint, 11 oz, Gloss ClearRust-Oleum 366439 High Performance Wheel Spray Paint, 11 oz, Gloss ClearCheck Price
Armor All Extreme Wheel and Tire Cleaner , Car Wheel Cleaner Spray, 24 Fl OzArmor All Extreme Wheel and Tire Cleaner , Car Wheel Cleaner Spray, 24 Fl OzCheck Price
CERAKOTE Rapid Ceramic Wheel Sealant - Ceramic Spray Coating for Wheels - Quick and Easy to Apply - Repels Brake Dust – Extremely HydrophobicCERAKOTE Rapid Ceramic Wheel Sealant - Ceramic Spray Coating for Wheels - Quick and Easy to Apply - Repels Brake Dust – Extremely HydrophobicCheck Price
303 Products Spray & Rinse Ceramic Sealant – Quick Ceramic Coating – Water-Activated SiO2 Formula – 6 Months of Protection – Water Repellent Ceramic Spray – Easy to Use – 16 Oz (Pack of 1) (30262)303 Products Spray & Rinse Ceramic Sealant – Quick Ceramic Coating – Water-Activated SiO2 Formula – 6 Months of Protection – Water Repellent Ceramic Spray – Easy to Use – 16 Oz (Pack of 1) (30262)Check Price
Griot's Garage Ceramic 3-in-1 Wax, SiO2 Spray for Cars, Trucks, and RV’s, Provides Protection and Water Beading on Paint, Wheels, Plastic, Rubber Trim, Chrome, and More, 10978, 22 ozGriot's Garage Ceramic 3-in-1 Wax, SiO2 Spray for Cars, Trucks, and RV’s, Provides Protection and Water Beading on Paint, Wheels, Plastic, Rubber Trim, Chrome, and More, 10978, 22 ozCheck Price
Optimum Opti-Seal Polymer Paint Sealant Spray for Automotive Paint and Interior Car Detailing, Includes Detailing Applicator Pad (8 oz)Optimum Opti-Seal Polymer Paint Sealant Spray for Automotive Paint and Interior Car Detailing, Includes Detailing Applicator Pad (8 oz)Check Price
CARPRO HydrO2 Lite Touchless Silica Sealant - Spray-On and Rinse-Off Automotive Paint Sealant - Ready to Use Formula - Liter with Sprayer (34oz)CARPRO HydrO2 Lite Touchless Silica Sealant - Spray-On and Rinse-Off Automotive Paint Sealant - Ready to Use Formula - Liter with Sprayer (34oz)Check Price

Detailed Product Reviews

1. CERAKOTE® Platinum Rapid Ceramic Paint Sealant Spray - 14 oz Bottle - Maximum Gloss & Shine – Extremely Hydrophobic – Unmatched Slickness - Ceramic Spray Coating - 50 Wash Rating

CERAKOTE® Platinum Rapid Ceramic Paint Sealant Spray - 14 oz Bottle - Maximum Gloss & Shine – Extremely Hydrophobic – Unmatched Slickness - Ceramic Spray Coating - 50 Wash Rating

Overview: CERAKOTE® Platinum Rapid Ceramic Paint Sealant Spray brings professional-grade ceramic protection to the DIY enthusiast. This 14-ounce bottle delivers an industry-leading 50 wash rating, promising months of durable protection with genuine ceramic technology. The formula creates extreme hydrophobic properties that actively repel water, road grime, and contaminants while achieving a mirror-like gloss with minimal effort. Application is straightforward: wash, dry, spray, and buff—no complicated multi-stage processes or extended cure times required.

What Makes It Stand Out: The 50 wash rating genuinely separates this from competitors typically offering 10-20 washes. Its true ceramic composition creates violent water sheeting behavior that keeps vehicles cleaner longer. The finish delivers unsurpassed slickness that must be experienced firsthand, while the simple spray-and-buff application eliminates the learning curve associated with professional coatings.

Value for Money: At $19.69, this offers exceptional value compared to professional ceramic applications costing hundreds. Achieving 3-6 months of authentic ceramic protection for under twenty dollars makes regular maintenance affordable. It significantly outperforms traditional synthetic sealants at similar price points while delivering genuine ceramic benefits.

Strengths and Weaknesses: Strengths: Industry-leading longevity; true ceramic technology; extreme hydrophobicity; straightforward application; mirror-like gloss.

Weaknesses: Requires thorough surface preparation; not permanent like pro coatings; reapplication needed sooner in harsh climates.

Bottom Line: The ultimate spray ceramic sealant for enthusiasts seeking professional results without professional costs. The 50 wash rating delivers measurable, long-lasting protection that justifies every penny.


2. GYEON Wet Coat 500ml - Hydrophobic Ceramic Spray Coating for Cars - High Gloss Solutions for Your Car Paint Wheels and Glass - Spray On Rinse Off Easy DIY Use Formula

GYEON Wet Coat 500ml - Hydrophobic Ceramic Spray Coating for Cars - High Gloss Solutions for Your Car Paint Wheels and Glass - Spray On Rinse Off Easy DIY Use Formula

Overview: GYEON Wet Coat redefines ceramic protection with its revolutionary spray-on, rinse-off application. This 500ml bottle delivers instant hydrophobic properties and high gloss to paint, wheels, glass, and exterior plastics. Unlike traditional wipe-on sealants, Wet Coat activates upon water contact, making it ideal for maintaining existing ceramic coatings or boosting protection on untreated surfaces. The formula creates immediate water beading without requiring buffing or curing.

What Makes It Stand Out: The rinse-off methodology eliminates streaking and high-spotting risks that plague wipe-on ceramics. It serves as a ceramic coating maintainer, rejuvenating existing coatings’ beading performance. Its versatility across all exterior surfaces—including glass and trim—makes it exceptionally convenient for comprehensive treatment without purchasing multiple products.

Value for Money: At $24.99, Wet Coat positions itself as a premium maintenance solution. While pricier than traditional quick detailers, its ability to extend professional coating life and provide genuine ceramic protection justifies the investment. The “less is more” application method ensures the 500ml bottle lasts through numerous treatments.

Strengths and Weaknesses: Strengths: Foolproof application; no wiping required; excellent coating maintenance; multi-surface versatility; immediate results.

Weaknesses: Requires immediate rinsing; over-application causes issues; less durable than wipe-on alternatives; works only on wet surfaces.

Bottom Line: An essential maintenance tool for ceramic-coated vehicles and the safest entry point for ceramic beginners. The unique application delivers consistent, professional results with virtually no learning curve.


3. Chemical Guys HydroSpin Wheel & Rim Ceramic Coating and Quick Detailer - 16 oz Spray Protects Wheels, Rims, and Brake Parts with Hydrophobic Ceramic Shine - Safe for Cars, Trucks, SUVs, Motorcycles

Chemical Guys HydroSpin Wheel & Rim Ceramic Coating and Quick Detailer - 16 oz Spray Protects Wheels, Rims, and Brake Parts with Hydrophobic Ceramic Shine - Safe for Cars, Trucks, SUVs, Motorcycles

Overview: Chemical Guys HydroSpin specifically targets wheel protection, merging ceramic coating technology with quick detailer convenience. This 16-ounce spray creates a hydrophobic barrier on wheels and rims, actively repelling brake dust and road grime while delivering lasting shine. Formulated for all wheel finishes—from powder-coated to polished—it addresses the most challenging vehicle maintenance area with precision.

What Makes It Stand Out: The dedicated wheel formulation recognizes wheels face unique challenges compared to paint. It actively resists extreme heat and metallic particles from brake dust that destroy standard sealants. The dual-function design allows both protective coating application and quick touch-ups between washes, maintaining that just-detailed appearance without separate products.

Value for Money: At $19.97, HydroSpin offers wheel-specific protection at a competitive price. Considering wheels require the most frequent cleaning, reducing maintenance time by half quickly offsets the investment. It consolidates wheel sealant and quick detailer functions into one bottle, saving money and storage space.

Strengths and Weaknesses: Strengths: Purpose-built for wheels; safe across all finishes; excellent brake dust repellency; quick detailer functionality; heat-resistant formula.

Weaknesses: Smaller 16oz bottle; requires cool surface application; not suitable for full vehicle use; frequent reapplication needed for daily drivers.

Bottom Line: The best wheel-specific ceramic spray available. If you’re tired of weekly brake dust scrubbing, HydroSpin delivers genuine protection that makes wheel cleaning nearly effortless.


4. Rust-Oleum 366439 High Performance Wheel Spray Paint, 11 oz, Gloss Clear

Rust-Oleum 366439 High Performance Wheel Spray Paint, 11 oz, Gloss Clear

Overview: Rust-Oleum High Performance Wheel Spray Paint takes a fundamentally different approach to wheel enhancement. This 11-ounce gloss clear coat provides a permanent painted finish for aluminum, steel wheels, and plastic hubcaps. Unlike temporary sealants, it creates a durable barrier preventing rust while delivering glossy shine through actual paint technology, not chemical coatings. The advanced formula dries to the touch in just ten minutes and covers up to eight square feet per can.

What Makes It Stand Out: This is authentic paint, not a coating. The formula delivers three times the durability of previous versions, addressing cosmetic damage and corrosion simultaneously. It excels at restoring older wheels rather than maintaining pristine ones, with spray application reaching areas brush-on products cannot access. The finish provides excellent dent and scratch resistance for long-term durability.

Value for Money: At $8.12, this offers the most economical wheel transformation available. Professional powder coating costs $100+ per wheel, while this delivers similar aesthetic benefits for under ten dollars. For restoration projects, the price-to-performance ratio is exceptional.

Strengths and Weaknesses: Strengths: Extremely affordable; permanent rust prevention; quick drying; excellent coverage; durable finish; professional results.

Weaknesses: Requires extensive prep work; permanent color change; not for already-coated wheels; limited coverage per can; strong fumes.

Bottom Line: Perfect for restoration projects and winter wheel protection. This isn’t a maintenance product but a refinishing solution that delivers professional results at DIY prices.


5. Armor All Extreme Wheel and Tire Cleaner , Car Wheel Cleaner Spray, 24 Fl Oz

Armor All Extreme Wheel and Tire Cleaner , Car Wheel Cleaner Spray, 24 Fl Oz

Overview: Armor All Extreme Wheel and Tire Cleaner positions itself as the budget-friendly solution for basic wheel maintenance. This 24-ounce spray dissolves brake dust, road grime, and grease on contact, promising safe cleaning for all wheel types. At its sub-five-dollar price point, it targets value-conscious consumers seeking effective cleaning without protective frills.

What Makes It Stand Out: The universal safety formulation eliminates wheel compatibility guesswork—safe for clear-coated, painted, steel, and aluminum wheels. The spray-and-rinse design requires minimal effort, with the formula actively breaking down metallic brake dust particles that typically demand aggressive scrubbing. It includes tire cleaning capabilities, offering two-in-one functionality that simplifies the cleaning process.

Value for Money: At $4.97, this is the most economical wheel cleaner from a major brand. Costing less than a coffee, it delivers reliable performance matching products three times the price. For vehicles needing regular cleaning without existing coatings, the price-to-performance ratio is exceptional.

Strengths and Weaknesses: Strengths: Unbeatable price; safe for all wheels; effective grease dissolving; includes tire cleaning; widely available.

Weaknesses: No protective properties; may require agitation on heavy buildup; not pH-neutral; stronger scent; no hydrophobic benefits.

Bottom Line: An excellent entry-level cleaner for budget-minded owners. While it won’t protect like ceramic sprays, it reliably performs its core cleaning function at an unbeatable price.


6. CERAKOTE Rapid Ceramic Wheel Sealant - Ceramic Spray Coating for Wheels - Quick and Easy to Apply - Repels Brake Dust – Extremely Hydrophobic

CERAKOTE Rapid Ceramic Wheel Sealant - Ceramic Spray Coating for Wheels - Quick and Easy to Apply - Repels Brake Dust – Extremely Hydrophobic

Overview: CERAKOTE’s Rapid Ceramic Wheel Sealant delivers specialized protection for wheels using true ceramic technology. This $15.95 spray forms an ultra-slick barrier that actively repels brake dust and road grime while creating a deep, mirror-like finish. Designed for painted, powder-coated, polished, and chrome surfaces, it works as either a standalone sealant or as a performance booster over existing ceramic coatings.

What Makes It Stand Out: Unlike all-purpose sealants, this formula targets wheel-specific challenges with military-grade ceramic chemistry. The extremely hydrophobic surface not only beads water but actively prevents brake dust adhesion—a game-changer for maintaining clean wheels between washes. Its dual-function design allows enthusiasts to enhance existing coatings rather than strip and replace, while the quick spray-and-buff application delivers professional results without specialized equipment.

Value for Money: At $15.95, you’re paying a modest premium for wheel-specific engineering versus generic sealants. However, considering brake dust is among the most corrosive contaminants your vehicle faces, the prevention of pitting and etching easily justifies the cost. Most users report 2-3 months of protection per application, making it competitive with pricier wheel coatings that require complex prep work.

Strengths and Weaknesses:

  • Strengths: True ceramic durability; exceptional brake dust repellency; enhances existing coatings; works on all wheel finishes; straightforward application
  • Weaknesses: Limited to wheels only; requires buffing (not touchless); may need reapplication after harsh winter conditions; initial cure time needed

Bottom Line: For enthusiasts tired of weekly wheel scrubbing, CERAKOTE delivers targeted ceramic protection that genuinely reduces maintenance while enhancing appearance—making it a smart investment for any vehicle with exposed brake dust issues.


7. 303 Products Spray & Rinse Ceramic Sealant – Quick Ceramic Coating – Water-Activated SiO2 Formula – 6 Months of Protection – Water Repellent Ceramic Spray – Easy to Use – 16 Oz (Pack of 1) (30262)

303 Products Spray & Rinse Ceramic Sealant – Quick Ceramic Coating – Water-Activated SiO2 Formula – 6 Months of Protection – Water Repellent Ceramic Spray – Easy to Use – 16 Oz (Pack of 1) (30262)

Overview: 303 Products leverages 40 years of protection expertise with this innovative water-activated SiO2 ceramic sealant. Priced at $14.99 for 16 ounces, this spray-and-rinse formula delivers six months of hydrophobic protection across paint, glass, and wheels. The unique chemistry activates on contact with water, eliminating traditional buffing and reducing application time to mere minutes.

What Makes It Stand Out: The water-activation technology represents a genuine innovation—simply spray onto a wet surface, immediately rinse, and dry for instant ceramic protection. This touchless approach minimizes scratching risks while ensuring even coverage in hard-to-reach areas. The 6-month durability claim from a spray sealant is impressive, particularly for a product safe on all exterior surfaces including clear coats and trim.

Value for Money: Exceptional value at under $15 for a product that covers your entire vehicle exterior. Traditional ceramic coatings cost hundreds professionally applied, while most spray ceramics last 2-3 months. Getting six months of protection from a 16-ounce bottle that treats multiple vehicles makes this one of the most cost-effective ceramic solutions available, especially for maintenance washes.

Strengths and Weaknesses:

  • Strengths: Revolutionary water-activation; no buffing required; safe for all exterior surfaces; 40-year brand reputation; 6-month protection; extremely user-friendly
  • Weaknesses: Must apply to wet surfaces only; rinsing may waste product if not careful; less durable than professional coatings; temperature-sensitive application

Bottom Line: 303’s Spray & Rinse Ceramic Sealant democratizes ceramic protection, offering near-professional durability with consumer-friendly application—ideal for time-conscious enthusiasts seeking maximum protection with minimal effort.


8. Griot’s Garage Ceramic 3-in-1 Wax, SiO2 Spray for Cars, Trucks, and RV’s, Provides Protection and Water Beading on Paint, Wheels, Plastic, Rubber Trim, Chrome, and More, 10978, 22 oz

Griot's Garage Ceramic 3-in-1 Wax, SiO2 Spray for Cars, Trucks, and RV’s, Provides Protection and Water Beading on Paint, Wheels, Plastic, Rubber Trim, Chrome, and More, 10978, 22 oz

Overview: Griot’s Garage delivers American-made versatility with this 22-ounce Ceramic 3-in-1 Wax, combining SiO2 ceramic technology with traditional wax benefits. At $21.99, it protects paint, plastic, rubber, chrome, and wheels through a simple spray-and-wipe application. The formula creates a self-cleaning hydrophobic layer that actively repels dirt while providing months of durable shine.

What Makes It Stand Out: This is a true multi-surface champion—most ceramic sprays restrict usage to paint and glass, but Griot’s engineered compatibility with rubber trim, plastic cladding, and wheels without staining or discoloration. The “3-in-1” designation means it simultaneously cleans light contaminants, protects with SiO2 polymers, and enhances gloss in one step. Made in the USA quality control ensures consistent batch performance.

Value for Money: The $21.99 price point reflects the 22-ounce volume and multi-surface versatility. Rather than buying separate trim dressing, wheel sealant, and paint ceramic, this single product streamlines your detailing arsenal. For RV and truck owners with diverse exterior materials, the cost savings multiply. Durability rivals dedicated paint ceramics, typically lasting 3-4 months, making it mid-range priced but high-value for versatility.

Strengths and Weaknesses:

  • Strengths: True multi-surface safety; self-cleaning hydrophobic effect; USA manufacturing; large 22oz volume; replaces multiple products; excellent on textured plastics
  • Weaknesses: Jack-of-all-trades but master of none; may not outperform dedicated wheel sealants; spray nozzle can be finicky; requires buffing on paint

Bottom Line: Griot’s Ceramic 3-in-1 Wax excels as the ultimate all-in-one solution for vehicle owners wanting comprehensive ceramic protection without the complexity of multiple specialized products.


9. Optimum Opti-Seal Polymer Paint Sealant Spray for Automotive Paint and Interior Car Detailing, Includes Detailing Applicator Pad (8 oz)

Optimum Opti-Seal Polymer Paint Sealant Spray for Automotive Paint and Interior Car Detailing, Includes Detailing Applicator Pad (8 oz)

Overview: Optimum’s Opti-Seal takes a polymer-based approach rather than ceramic, offering cross-linked polymer protection for $29.49 in an 8-ounce bottle. This versatile spray creates a streak-free barrier on paint, wheels, trim, and even interior surfaces (excluding rubber). The included applicator pad ensures proper thin-layer application for a cloud-free, showroom finish that locks out contaminants.

What Makes It Stand Out: The polymer chemistry differs from the SiO2 crowd, providing unique benefits like flexibility and self-healing properties that rigid ceramics lack. Its interior-safe formulation allows unified protection across your entire vehicle—dashboard, door panels, and leather can all receive the same UV-blocking treatment. The cross-linked polymer network creates a molecular barrier that’s chemically resistant yet breathable, preventing trapped moisture issues.

Value for Money: At $29.49 for 8 ounces, Opti-Seal commands premium pricing but delivers exceptional versatility. One bottle can protect both exterior and interior surfaces, eliminating separate interior detailers and trim dressings. A single ounce typically covers an entire vehicle exterior, making the per-use cost reasonable. For Optimum system users pairing with ONR wash and Hyper Polish, the synergy maximizes value.

Strengths and Weaknesses:

  • Strengths: Interior/exterior versatility; streak-free application; cross-linked polymer durability; included applicator; chemical resistance; pairs with Optimum ecosystem
  • Weaknesses: Highest cost per ounce; polymer chemistry less trendy than ceramic; smaller volume; requires careful application to avoid streaking

Bottom Line: Opti-Seal is the thinking person’s sealant—prioritizing chemical engineering over marketing trends. Ideal for detailers wanting unified interior/exterior protection with proven polymer technology.


10. CARPRO HydrO2 Lite Touchless Silica Sealant - Spray-On and Rinse-Off Automotive Paint Sealant - Ready to Use Formula - Liter with Sprayer (34oz)

CARPRO HydrO2 Lite Touchless Silica Sealant - Spray-On and Rinse-Off Automotive Paint Sealant - Ready to Use Formula - Liter with Sprayer (34oz)

Overview: CARPRO’s HydrO2 Lite revolutionizes sealant application with true touchless silica technology. This $31.95, 34-ounce ready-to-use formula requires zero buffing—simply spray onto a wet surface and rinse for instant, durable protection. The silica-based chemistry reacts with water to bond directly to paint, metal, plastic, and even undercarriage components, reaching areas traditional waxes cannot access.

What Makes It Stand Out: This is professional-grade innovation made accessible. The touchless application eliminates swirl risks while allowing protection of calipers, wheel wells, door jambs, and between seals—areas typically neglected. The chemistry activates on water contact, converting hydrophilic surfaces to hydrophobic instantly. For professionals, the time savings are enormous; for enthusiasts, it enables comprehensive protection previously impossible without lifts and tools.

Value for Money: While $31.95 is the highest price here, the 34-ounce volume and professional results justify the investment. One liter treats multiple vehicles completely, including hard-to-reach areas that would require hours of labor otherwise. The protection lasts 3-6 months depending on conditions, rivaling coatings costing ten times more when factoring professional installation. For those valuing time and thoroughness, it’s arguably the best value.

Strengths and Weaknesses:

  • Strengths: True touchless application; reaches inaccessible areas; professional-grade durability; large 34oz volume; safe on all exterior surfaces; massive time savings
  • Weaknesses: Highest upfront cost; requires careful rinse technique; overkill for casual users; learning curve for optimal results; must apply to wet surfaces

Bottom Line: CARPRO HydrO2 Lite is the professional detailer’s secret weapon—transforming comprehensive ceramic protection from a day-long ordeal into a 15-minute, touchless process that leaves no surface unprotected.


What Are Wheel Sealants and Why Your Wheels Deserve Them

Wheel sealants are specialized protective coatings engineered specifically for the extreme environment your wheels endure. Unlike paint sealants designed for body panels, these formulations must withstand constant heat cycling, exposure to aggressive metallic brake dust, and regular contact with harsh wheel cleaners. The spray format has gained dominance because it atomizes the product into fine particles that can reach behind spokes, into lug nut recesses, and across intricate mesh patterns without requiring applicator pads that can miss spots or leave streaks.

The fundamental purpose remains consistent: create a durable, transparent barrier that prevents contaminants from bonding to your wheel’s finish. When brake dust hits an unprotected wheel, the metallic particles embed into the microscopic pores of the clear coat, oxidizing and creating that characteristic brown haze that requires acidic cleaners to remove. A quality sealant fills these pores and creates a slick, low-energy surface where contaminants can’t gain a foothold. The result? Dust rinses away with plain water, and your wheels maintain that deep, glossy finish for months rather than weeks.

The Science Behind Spray Wheel Sealants: How They Work

Hydrophobic Technology and Surface Energy

At the molecular level, spray wheel sealants work by dramatically reducing surface energy. Your wheel’s factory finish, even when polished, has high surface energy that allows liquids and particles to spread and adhere. Quality sealants deposit either silicone-dioxide (SiO2) ceramic particles or synthetic polymer chains that cross-link to form a uniform, low-energy lattice. This creates a contact angle for water that exceeds 110 degrees, causing droplets to bead tightly and roll off, carrying loose contaminants with them.

Heat Resistance and Thermal Stability

The real magic lies in thermal stability. Brake systems regularly see temperatures between 200-500°F during normal driving, and track days can push this past 800°F. Standard carnauba wax melts at approximately 180°F, making it useless for wheels. Premium spray sealants utilize inorganic compounds that maintain their molecular structure well beyond these temperatures. SiO2-based formulas, for instance, remain stable until approximately 1,200°F, ensuring your protection doesn’t vaporize when you need it most.

Chemical Bonding vs. Physical Layering

Understanding the difference between chemical bonding and physical deposition is crucial. Some polymer sealants form a physical layer that sits atop the surface, providing 1-3 months of protection. Advanced ceramic-infused sprays create semi-permanent covalent bonds with the wheel’s clear coat, essentially becoming part of the surface itself. This bonding is what enables 6-12 month durability claims, though it also requires more meticulous prep work to ensure proper adhesion.

Key Benefits of Using Spray Wheel Sealants

Effortless Maintenance Washing

The most immediate benefit you’ll notice is the dramatic reduction in wash time. Protected wheels require nothing more than a pressure rinse to remove 80% of accumulated brake dust. What once demanded aggressive brushing and acidic wheel cleaners now needs only a gentle wipe with a microfiber mitt and pH-neutral shampoo. This not only saves time but preserves your wheel finish from abrasive cleaning methods.

Protection Against Etching and Pitting

Brake dust isn’t just ugly—it’s destructive. The metallic particles, combined with moisture and heat, create a galvanic corrosion cell that can etch permanently into clear coats. Over months, this leads to pitting that no amount of polishing can fix. A robust sealant creates an ionically impermeable barrier that prevents this electrochemical reaction from reaching your wheel’s surface.

Enhanced Aesthetic Finish

Beyond protection, modern sealants enhance the visual depth of your wheels. They fill micro-scratches and create a glass-like clarity that makes metallic flakes pop and darkens black finishes to a rich, wet look. Many formulations include gloss agents that provide that coveted “just detailed” appearance even weeks after application.

UV and Oxidation Resistance

Wheels face constant UV exposure, especially on open-spoke designs. This radiation breaks down clear coats over time, leading to yellowing and chalking. Quality sealants contain UV inhibitors that absorb harmful radiation before it reaches the underlying finish, essentially acting as sunscreen for your rims.

Understanding Different Types of Wheel Sealants

Silicone-Dioxide (SiO2) Ceramic Sprays

These represent the current pinnacle of spray sealant technology. Containing actual ceramic nanoparticles suspended in a carrier fluid, they offer the highest heat resistance and longest durability. They typically require a short curing period where the carrier evaporates and the SiO2 cross-links with the surface. The trade-off is they demand absolutely clean wheels—any oils or residues will prevent proper bonding.

Polymer-Based Synthetic Sealants

Polymer formulas use chains of synthetic molecules that intertwine to create a flexible, durable film. They’re more forgiving during application and don’t require the same level of surface prep as ceramics. While they won’t last as long—typically 2-4 months—they’re excellent for enthusiasts who prefer to reapply protection more frequently or live in climates where road salt demands winter-specific applications.

Hybrid Ceramic-Polymer Formulations

The most common type found in premium spray bottles, these combine ceramic particles with polymer resins to balance ease of use with impressive durability. The polymers provide immediate protection and gloss while the ceramics cure for long-term performance. This “best of both worlds” approach has made hybrids the go-to choice for most detailing enthusiasts.

Water-Based vs. Solvent-Based Carriers

The delivery system matters as much as the active ingredients. Water-based formulas are lower in VOCs, safer for plastic and rubber components, and easier to clean up if you overspray. Solvent-based carriers typically offer better bonding and longer durability but require more careful application to avoid damaging brake components or painted calipers.

Essential Features to Look for in a Quality Spray Wheel Sealant

Heat Resistance Rating

Always check the specified temperature stability. Quality products will explicitly state their heat resistance, typically ranging from 500°F to 800°F for premium options. Anything below 400°F is unsuitable for performance vehicles or track use. The rating should be backed by technical data, not just marketing claims.

Hydrophobic Performance Metrics

Look for products that specify water contact angle—110° to 120° is excellent. Some manufacturers provide video demonstrations or standardized testing (like ASTM D7334) showing water behavior. Be wary of vague “water beading” claims without quantification.

Durability Expectations

Honest manufacturers provide realistic durability ranges based on driving conditions. A product claiming “up to 12 months” should specify this assumes garage storage, weekly washing, and moderate driving. Daily drivers in harsh climates should expect 4-6 months from even the best sprays. Beware of lifetime or multi-year claims for spray products—these are unrealistic for removable coatings.

Chemical Resistance Profile

Your sealant must withstand wheel cleaners, road salt, and acidic rain. Look for pH resistance ranges (typically 2-12) and specific mentions of resistance to iron fallout removers and tar dissolvers. This is critical because you’ll still need to deep clean occasionally, and your sealant shouldn’t strip away with the first strong cleaner.

Application Temperature Window

Professional-grade products specify ideal application temperatures, usually between 50-80°F with low humidity. This ensures proper flash time and curing. Some advanced formulas offer wider windows, which is valuable if you’re working in unheated garages or variable climates.

Durability Factors: What Determines Longevity

Driving Conditions and Brake Pad Composition

Your specific situation dramatically impacts sealant life. Track driving with aggressive carbon-metallic pads generates extreme heat and abrasive dust that can overwhelm any sealant. Daily commuting with ceramic pads is far gentler. City driving with frequent stop-and-go traffic is more severe than highway cruising. Adjust your expectations and reapplication schedule accordingly.

Wheel Material and Surface Preparation

Raw aluminum or polished wheels without clear coat will see shorter sealant life because the surface is more porous and reactive. Properly prepped painted or powder-coated wheels provide the ideal substrate. The preparation quality matters more than the product itself—a sealant applied to a perfectly decontaminated surface will outlast the same product slapped onto a wheel with residual oils.

Climate and Environmental Exposure

Coastal environments with salt air, regions using magnesium chloride road treatments, or areas with high industrial fallout will degrade sealants faster. UV intensity also plays a role—Arizona sun is more brutal than Pacific Northwest cloud cover. Consider seasonal applications in harsh environments, switching to a winter-specific formula when roads are treated.

Maintenance Routine Paradox

Ironically, improper maintenance shortens sealant life more than anything else. Using harsh acidic wheel cleaners strips protection rapidly. Conversely, never washing allows contaminants to accumulate and eventually penetrate the barrier. The sweet spot is weekly gentle washing with pH-neutral shampoo and periodic decontamination with iron removers specifically labeled as “sealant safe.”

Application Techniques for Professional Results

The Critical Prep Phase

Start with a thorough wash using a dedicated wheel shampoo and various brushes to reach every surface. Follow with an iron fallout remover—spray liberally and watch it turn purple as it dissolves embedded brake dust. For truly neglected wheels, a clay bar treatment with plenty of lubricant will remove bonded contaminants. Finish with a surface prep spray (isopropyl alcohol solution) to remove any oils, ensuring a pristine surface.

Environmental Control

Apply in a shaded area with surface temperatures between 60-75°F. Use an infrared thermometer to verify wheel temperature—never apply to wheels hotter than 90°F or colder than 50°F. Humidity below 60% is ideal; high humidity extends curing time and can cause streaking. Have a fan ready to circulate air if you’re working in a garage.

The Spray-and-Spread Method

Shake the bottle vigorously for 60 seconds to ensure proper mixing of active ingredients. Mist lightly across the wheel face, holding the bottle 6-8 inches away. You’re aiming for a fine, even coating—not a soaking wet surface. Immediately spread with a clean microfiber applicator pad using cross-hatch patterns to ensure complete coverage. Work one wheel at a time, as most products have a short “flash” window before they begin setting.

Curing and Layering

Allow the first layer to flash for the manufacturer’s specified time—typically 1-3 minutes. You’ll see it begin to haze slightly. Buff gently with a plush microfiber towel, using light pressure to avoid removing product from crevices. For maximum durability, apply a second layer after 30-60 minutes. Avoid driving for at least 4 hours; full curing takes 24 hours. During this time, keep wheels dry and avoid aggressive braking that generates excessive heat.

Common Mistakes to Avoid When Applying Wheel Sealants

Skipping the Decontamination Step

This is the number one reason sealants fail prematurely. Even wheels that look clean harbor microscopic brake dust particles and iron deposits. Skipping the iron remover stage means you’re sealing contaminants under the coating, preventing proper bonding and creating failure points. The extra 15 minutes for chemical decontamination pays dividends in months of added protection.

Overspray on Brake Components

Brake rotors, pads, and calipers are extremely sensitive to contamination. Even a light mist of sealant can reduce braking performance or cause squealing. Always cover rotors with a plastic bag and stuff clean rags behind spokes to protect calipers. If you do get overspray on rotors, clean immediately with brake cleaner—never rely on the first few brake applications to “burn it off.”

Applying Too Much Product

More isn’t better. Excessive product doesn’t increase protection; it creates a thick layer that’s prone to streaking, hazing, and premature failure. A properly applied sealant should be nearly invisible—if you can see a thick white residue, you’ve over-applied. The correct amount is just enough to create a uniform, thin film that flashes within the specified time.

Ignoring Temperature and Humidity Limits

Applying sealant in direct sunlight or on hot wheels causes the carrier to evaporate instantly, preventing proper leveling and bonding. Cold temperatures prevent the active ingredients from properly cross-linking. Always check the thermometer and weather forecast. A rushed application in poor conditions is worse than waiting for optimal weather.

How to Properly Prep Your Wheels Before Application

Deep Cleaning Beyond the Surface

Start with a pressure rinse to remove loose debris. Use a dedicated wheel cleaner that’s pH-neutral if your wheels are sealed, or a mildly acidic formula for initial deep cleans on unprotected wheels. Employ multiple brush types: a long-reach soft bristle brush for barrels, a lug nut brush for recesses, and a detail brush for tight corners. Spend 20-30 minutes per wheel on this step alone—thoroughness here determines final results.

Chemical Decontamination Process

After washing, spray an iron fallout remover generously across the entire wheel surface, including the barrel. Wait 3-5 minutes for the chemical reaction to complete—the color change indicates it’s working. Don’t let it dry completely. Agitate with a soft brush, then rinse thoroughly. For tar spots, follow with a solvent-based tar remover applied with a microfiber towel. This two-step chemical process removes contaminants that mechanical cleaning can’t touch.

Mechanical Decontamination for Perfection

For wheels that have never been sealed or show signs of roughness, clay barring is essential. Use a fine grade clay bar with plenty of lubricant—never clay on a dry surface. Work in small sections, folding the clay frequently to expose clean material. You’ll feel the clay grab initially, then glide smoothly as contaminants are removed. This step is time-consuming but creates a surface smooth as glass, ensuring maximum sealant adhesion.

Final Surface Prep

Mix isopropyl alcohol with distilled water in a 1:1 ratio in a spray bottle. Mist this onto a microfiber towel (never directly on the wheel) and wipe down all surfaces. This removes any remaining polishing oils, fingerprints, or residues that could interfere with bonding. Use a separate dry microfiber to buff away any streaks. Your wheels should now feel squeaky clean and be ready for sealant.

Maintenance Tips to Extend Sealant Life

The Weekly Rinse Ritual

Make it a habit to rinse your wheels with plain water every few days, especially after heavy braking. This simple act removes loose brake dust before it can accumulate and compromise the sealant. Use a garden hose with a nozzle set to “jet” to blast dust from behind spokes and out of lug nut holes. This 5-minute routine can double your sealant’s effective life.

Proper Washing Protocol

When it’s time for a full wash, always use a pH-neutral, sealant-safe wheel shampoo. Harsh cleaners strip protection layer by layer. Use the two-bucket method with grit guards, and dedicate a wash mitt solely to wheels to avoid cross-contamination. Work from top to bottom, rinsing your mitt frequently. Dry immediately with a dedicated microfiber towel to prevent water spots, which can etch through the sealant over time.

Decontamination Maintenance Washes

Every 4-6 weeks, perform a “maintenance decon” wash. After your regular shampoo, spray a sealant-safe iron remover (these are formulated to be gentler than heavy-duty versions) and let it dwell for 2 minutes before rinsing. This removes embedded particles without stripping the sealant. Follow with a quick detailer spray containing SiO2 to rejuvenate the hydrophobic properties.

Avoiding Automatic Car Washes

The harsh chemicals and abrasive brushes in automatic washes destroy wheel sealants rapidly. Even “touchless” washes use extremely alkaline detergents that strip protection. Hand washing is non-negotiable if you want your sealant to last. If you must use an automatic wash in an emergency, plan to reapply sealant afterward.

Environmental Considerations and Eco-Friendly Options

VOC Regulations and Product Formulation

Many jurisdictions now restrict volatile organic compounds (VOCs) in automotive chemicals. Water-based sealants have evolved to match solvent-based performance while emitting fewer harmful vapors. Look for products compliant with California Air Resources Board (CARB) standards—these are the strictest and indicate a genuinely low-VOC formula. The trade-off is typically longer curing times, but the environmental and health benefits are substantial.

Biodegradable Active Ingredients

Next-generation sealants incorporate bio-based polymers derived from plant sources rather than petroleum. These offer comparable performance with reduced environmental persistence. Check for biodegradability certifications like OECD 301B. While currently more expensive, these represent the future of sustainable car care. They’re particularly valuable for enthusiasts who detail near storm drains or on porous surfaces.

Propellant Choices in Aerosol Packaging

Traditional aerosols use hydrocarbon propellants that contribute to greenhouse gas emissions. Newer formulas use compressed air or nitrogen, which are inert and environmentally neutral. Pump spray bottles eliminate propellants entirely, though they may not atomize as finely. Consider the packaging’s recyclability—aluminum bottles are infinitely recyclable, while complex plastic pumps often aren’t.

Water Runoff and Ecological Impact

Even eco-friendly sealants create contaminated runoff during application and washing. Always work on a sealed surface where you can capture and properly dispose of wastewater. Never rinse wheels onto soil or into storm drains. Some municipalities require detailing businesses to have water reclamation systems—home users should adopt similar responsibility by using wash mats that funnel water into collection containers.

Cost vs. Value: Making Smart Investment Decisions

Price Tier Analysis

Spray wheel sealants typically fall into three price categories: budget ($10-15), mid-range ($20-35), and premium ($40-60+). Budget options usually provide 1-2 months of protection and require frequent reapplication. Mid-range products offer the best value for most enthusiasts, delivering 4-6 months of solid performance. Premium sealants justify their cost through 8-12 month durability, advanced chemical resistance, and concentrated formulas where you’re paying for active ingredients, not water.

Concentration and Dilution Economics

Some professional-grade sealants come as concentrates that you dilute 1:1 or 1:2 with distilled water. While initially more expensive, the cost per application often drops below budget options. A 16-ounce concentrate can yield 48 ounces of usable product, effectively reducing a $50 purchase to under $17 per bottle’s worth. Calculate cost per ounce of active ingredient, not just sticker price.

Coverage Area Calculations

Premium sealants typically cover more area per ounce due to better formulation. A quality product should protect all four wheels with just 1-2 ounces. Cheaper options may require double the product for the same coverage, negating any price savings. Check manufacturer specifications for coverage estimates, and read reviews to verify real-world performance. A sealant that requires less product per application saves money and reduces application time.

Professional Application Cost-Benefit

Professional wheel sealant application typically costs $100-200 as a standalone service or $50-75 when bundled with a full detail. This includes thorough decontamination and expert application. For enthusiasts with expensive forged wheels or complex multi-piece designs, this can be worthwhile. However, learning proper DIY technique pays for itself after just two applications. The key is investing in proper prep chemicals and tools upfront, which amortize over dozens of applications.

Compatibility Concerns: Wheels, Brakes, and Finishes

Wheel Finish-Specific Considerations

Painted Wheels: Most common and least problematic. Ensure the sealant is compatible with clear coat—virtually all quality sprays are. Avoid products with high solvent content on fresh paint less than 30 days old.

Powder-Coated Wheels: Highly durable but can be sensitive to certain solvents. Test in an inconspicuous area first. Water-based sealants are safest. The good news is powder coat’s toughness means sealants bond exceptionally well, often exceeding durability estimates.

Polished Aluminum (No Clear Coat): These require sealants specifically formulated for bare metal. Standard products may cause hazing or uneven appearance. Look for “metal-specific” formulations that contain anti-corrosion inhibitors. Durability will be shorter—expect 2-3 months maximum.

Chrome Plated: Chrome is non-porous, so adhesion is challenging. Use sealants marketed for chrome or glass surfaces. The benefit is that once bonded, protection is excellent due to the stable substrate. Avoid anything abrasive or acidic in the prep stage.

Carbon Fiber Wheels: Extremely expensive and delicate. Use only sealants explicitly approved for composite materials. Many ceramic sprays are safe, but verify temperature ratings don’t exceed the resin’s tolerance. When in doubt, contact the wheel manufacturer.

Brake System Safety

Modern brake systems are incredibly sensitive to contamination. Sealant overspray on rotors can cause shuddering, reduced bite, and noise. Always mask rotors with plastic bags secured by lug nuts. For performance vehicles with carbon-ceramic brakes, this is absolutely critical—these rotors cost thousands and are ruined by chemical contamination. If you track your car, consider removing wheels entirely for sealant application to ensure zero contamination risk.

Caliper and Hardware Considerations

Painted calipers can benefit from the same sealant, but avoid getting product on brake pad material, slide pins, or bleeder screws. A light mist on caliper faces is fine and makes them easier to clean, but never spray directly onto hardware. For unpainted calipers, use a high-temp specific coating rather than a wheel sealant.

When to Apply Wheel Sealants: Timing and Frequency

Seasonal Application Strategy

The ideal times are spring and fall. Spring application protects against summer heat, UV, and road trip grime. Fall application shields against winter salt and harsh de-icing chemicals. In moderate climates, a single annual application may suffice. For four-season regions, consider a lighter “maintenance coat” every 3-4 months rather than heavy semi-annual applications.

New Wheel Preparation

Brand new wheels aren’t as clean as you think. They often have manufacturing residues, shipping protectants, and handling oils. Always deep clean and decontaminate new wheels before first sealant application. The fresh clear coat provides an ideal bonding surface, so this initial application will typically last the longest—sometimes exceeding manufacturer durability claims.

Visual Cues for Reapplication

Don’t rely solely on time intervals. Test hydrophobicity monthly by spraying water on the wheel face. If beading is inconsistent or water sheets rather than beads, it’s time to reapply. Another indicator is brake dust behavior—if it’s beginning to stick rather than rinse away, the sealant is failing. Perform a full decontamination and reapplication at this point rather than waiting for complete failure.

Pre-Track Day Protocols

For track enthusiasts, apply sealant at least one week before an event to ensure full curing. The heat cycling during track use will actually further cure the coating, improving performance. However, aggressive track pads generate so much dust that you may need to reapply immediately after the event. Consider track days as the ultimate durability test—if your sealant survives, it’s a keeper.

Professional vs. DIY: What You Need to Know

Skill Requirements and Learning Curve

DIY wheel sealant application isn’t difficult, but it demands attention to detail. The prep work requires more skill than the actual application. Learning proper decontamination techniques, recognizing when wheels are truly clean, and mastering the flash time takes 2-3 applications. Watch tutorial videos, start with easier-to-access wheels, and don’t attempt intricate multi-piece designs until you’ve mastered the basics.

Necessary Equipment Investment

Quality application requires specific tools: dedicated wheel shampoo ($15), iron remover ($20), clay bar kit ($25), surface prep spray ($15), microfiber towels ($30 for a set), applicator pads ($10), and the sealant itself ($30-50). The initial $135-155 investment seems high, but these supplies last for multiple applications. Professional-grade tools like a pressure washer and foam cannon ($300+) are optional but dramatically improve prep quality.

Time Investment Reality

Plan on 3-4 hours for a full application on a standard set of four wheels. This breaks down to 60-90 minutes for thorough cleaning and decon, 30 minutes for surface prep, and 60 minutes for sealant application and curing. Complex wheel designs or neglected surfaces can double this time. Compare this to a professional service that takes 2-3 hours but costs $150-200. Your time vs. money equation determines the best path.

When Professional Application is Justified

Consider hiring a pro if you have multi-piece wheels that require disassembly for proper protection, wheels with severe damage that need correction first, or if you own a vehicle where wheel removal is complex (many modern cars require recalibrating TPMS sensors). Additionally, if you’ve already invested in professional paint correction for your car, spending $200 to ensure your wheels match that level of perfection is logical.

Frequently Asked Questions

How long do spray wheel sealants actually last on a daily driver?

On a typical daily driver with ceramic brake pads and regular highway use, expect 4-6 months of solid performance from a mid-tier ceramic-infused spray. City driving with frequent stops may reduce this to 3-4 months. The key is monthly maintenance with a sealant-safe iron remover to prevent buildup that degrades the coating. Always test hydrophobicity rather than relying on time alone.

Can I apply wheel sealant to hot wheels right after driving?

Absolutely not. Wheels should be cool to the touch—below 90°F ideally. Hot wheels cause the carrier to evaporate instantly, preventing proper leveling and bonding. The thermal shock can also cause the sealant to cure unevenly, creating patchy protection. Wait at least 2-3 hours after driving, or ideally apply first thing in the morning when wheels are at ambient temperature.

Will wheel sealant damage my brake rotors or reduce braking performance?

The sealant itself won’t damage rotors, but overspray absolutely will contaminate the braking surface, causing squealing, vibration, and reduced stopping power. Always mask rotors thoroughly with plastic bags. If contamination occurs, clean rotors immediately with dedicated brake cleaner, not just soap and water. For performance driving, remove wheels entirely during application to eliminate any risk.

Are spray wheel sealants safe for matte or satin wheel finishes?

Most are safe, but you must verify the product specifically states “matte safe.” Gloss agents in some sealants can add unwanted shine to satin finishes. Look for “finish-neutral” formulations that protect without altering appearance. Always test on an inconspicuous area first. Matte finishes are more porous, so they may absorb more product—apply sparingly and buff thoroughly.

How do spray sealants differ from traditional wheel wax?

Wheel wax is typically carnauba-based, melting at around 180°F—useless for wheels that see 400°F+ regularly. Spray sealants use synthetic polymers or ceramics that remain stable above 500°F. Waxes last 2-4 weeks; quality sprays last months. Waxes require applicator pads and elbow grease; sprays offer superior coverage in intricate designs. The performance gap is enormous—wax is obsolete for wheel protection.

Can I use the same spray sealant on my wheels and car paint?

While some multi-surface sealants exist, dedicated wheel formulas are engineered for extreme heat and metallic dust—conditions car paint never experiences. Using paint sealant on wheels will fail quickly. Conversely, wheel sealants may be overkill for paint and could cause application issues like streaking on large panels. It’s best to use purpose-formulated products for each surface, though premium ceramic sprays often work excellently on both.

How soon can I drive after applying wheel sealant?

Minimum 4 hours before light driving, 24 hours before heavy braking or track use. The sealant may feel dry to the touch after 30 minutes, but the active ingredients need time to fully cross-link and cure. Driving too soon exposes the uncured coating to heat, dust, and water, compromising durability. Park the car with wheels rotated to different positions every few hours during curing to prevent flat spots from any residual tackiness.

Do I need to remove old sealant before reapplying?

Not completely, but you must remove any failing or contaminated layers. A strong iron remover and degreasing wash will remove most degraded sealant. If water no longer beads and brake dust sticks aggressively, the old sealant is essentially gone. For partial failure, use a surface prep spray or diluted IPA wipe-down before applying a new layer. Never layer new sealant over thick, failing old coating—it won’t bond properly.

Will a wheel sealant prevent all brake dust buildup?

No sealant prevents brake dust accumulation; it prevents it from bonding. You’ll still see dust, but it will be loose and rinse away easily. Think of it as non-stick cookware—you still get residue, but it wipes clean. Aggressive track pads or metallic street pads generate so much dust that some accumulation is inevitable, but cleaning effort reduces by 80-90% with proper sealant protection.

Can I apply wheel sealant to my brake calipers?

Painted calipers benefit greatly from the same sealant, enhancing their appearance and making them easier to clean. However, never spray directly onto calipers—overspray will contaminate pads and rotors. Instead, spray onto a microfiber applicator pad and wipe onto caliper surfaces carefully, avoiding all hardware, bleeder screws, and pad contact areas. For raw metal calipers, use a high-temp specific coating instead.