Answer: White elastomeric roof coatings and acrylic sealants provide the best energy savings and long-lasting protection for asphalt shingles when applied as a reflective, waterproof layer. The following products are among the top options for homeowners and professionals seeking a bright white, reflective finish that helps reduce heat absorption and extend roof life. This guide highlights who each product is best for and why it was selected, along with practical cautions.
| Product | Best For | Key Benefit |
|---|---|---|
| Ames MSS1 Maximum Stretch Roof Coating | Low-slope and RV roofs needing high elasticity | 650% elongation; 88% reflectivity |
| Rust-Oleum 710 Elastomeric Roof Coating (5 gal) | Whole-roof applications needing strong reflectivity | High reflectivity; weather resistance |
| Gardner-Gibson Sta-Kool 15-Year Turbo-Dri | Fast-drying, rain-safe installs | Cool-core technology; rain-safe in 30 minutes |
| Matvio White RV Roof Coating (1 quart) | RVs, campers, trailers with movable roofs | Solar-reflective; flexible, damp-surface application |
| Dicor RP-MRC-1 Acrylic Elastomeric Coating (1 Gal) | Metal RV roofing; temperature regulation | Excellent reflectivity; metal-specific |
AMES RESEARCH MSS1 Maximum Stretch Roof Coating
Brand: AMES. This white, elastomeric acrylic coating offers 650% elongation, reducing cracking and peeling on aging or flexible roof surfaces. It adheres to metal, tar, and rolled roofs and is designed for low-slope maintenance. Its bright white finish reflects sunlight and can help lower surface temperatures, contributing to potential cooling cost savings.
Who it’s best for: Homeowners with low-slope or RV roofs needing a highly flexible sealant that resists movement and weathering. Why selected: High elongation supports durability on surfaces that experience movement or flexing. Caution: For roofs with active leaks, preparatory sealing is necessary before coating for best results.
Rust-Oleum 710 Elastomeric Roof Coating (5 Gallon, White)
Brand: Rust-Oleum. This elastomeric coating delivers strong initial reflectivity with durable performance across weathered surfaces. It’s designed to form a waterproof seal within a practical cure window, helping reduce heat gain and extending roof life on asphalt and metal surfaces alike.
Who it’s best for: Projects needing substantial reflectivity and a robust, long-term seal across larger roof areas. Why selected: Known for reliable weather resistance and a clear cooling potential. Caution: Actual reflectivity can vary with surface condition and climate; prep is important for best adhesion.
Gardner-Gibson Sta-Kool 15-Year Turbo-Dri White Roof Coating
Brand: Gardner. This elastomeric coating features Cool-Core technology to reflect heat, keeping interiors cooler. It’s engineered to be rain-safe in 30 minutes and recoats in about three hours, enabling faster completion on larger jobs.
Who it’s best for: Roofers or DIYers who value quick rain resistance and short re-coat cycles on white roof coatings. Why selected: Turbo-Dri promotes faster project turnaround. Caution: Suitable for certain roof types; verify compatibility with your substrate before application.
Rust-Oleum 710 Elastomeric Roof Coating (2 Pack)
Brand: Rust-Oleum. This 2-pack variant offers extended coverage with similar cool-roof technology. It promises a waterproof seal within hours and strong energy-cost savings due to its reflective white finish.
Who it’s best for: Larger residential roofs or contractors who prefer a bundled option for efficiency. Why selected: Consistent performance characteristics with the single-gallon variant, making it a scalable choice. Caution: Ensure your surface is clean and dry for optimal adhesion and inspect for any pre-existing damage before coating.
Matvio White RV Roof Coating (1 Quart)
Brand: matvio. This solar-reflective, water-based coating is designed for RVs, campers, and trailers. It’s flexible, UV and heat resistant, and creates a waterproof membrane that remains pliable under movement.
Who it’s best for: Mobile structures where vibration and motion are common. Why selected: Water-based formula allows application on slightly damp surfaces for quick emergency leaks. Caution: One-quart size is best for smaller areas or touch-ups; larger roofs may require multiple quarts or a different product.
Dicor RP-MRC-1 Acrylic Elastomeric Coating (White, 1 Gal)
Brand: Dicor. This coating is formulated for metal RV roofing, offering a bright white finish that enhances reflectivity and interior cooling. It is temperature-regulating and designed to be compatible with metal RV roofs.
Who it’s best for: RV owners with metal roofing seeking a dedicated, metal-friendly acrylic elastomeric coating. Why selected: Temperature regulation through reflective white color helps reduce heat buildup. Caution: Not recommended for EPDM rubber or TPO roofing materials.
Buying Guide: Choosing The Right White Roof Coating
- Surface compatibility: Asphalt shingles often benefit from elastomeric or acrylic coatings that are designed for low-slope or irregular surfaces. Check substrate compatibility (metal, tar, or rolled roofing) when selecting a product.
- Reflectivity and cooling: Look for high initial reflectivity (often expressed as a percentage) to maximize heat reduction and interior comfort.
- Elasticity and movement: Roofs expand and contract with temperature; products with high elongation resist cracking and peeling.
- Drying time and recoat window: If you need faster completion, select coatings with short rain-safe or recoat times. This is especially helpful in variable climates.
- Application method: Consider whether the coating can be brushed, rolled, or sprayed, and whether it suits your project scale and equipment.
- Water resistance and ponding: For flat or low-slope roofs, water resistance and ponding tolerance are important to prevent leaks.
- Maintenance and longevity: Longer warranties or “turbo-dri” style formulations can reduce maintenance cycles, but verify compatibility with your roof type.
- Safety and environmental factors: Water-based formulas may offer easier cleanup and lower VOC levels; confirm local regulations and safety data before use.
FAQ
- Q: Will white roof coatings help lower my energy bill? A: Yes, reflective white coatings reduce heat absorption, which can lower cooling loads in hot climates.
- Q: Can I apply these coatings over existing roof coatings? A: Surface preparation is crucial; remove loose material and ensure the surface is clean, dry, and sound before application.
- Q: Are these coatings suitable for metal RV roofs? A: Some products are specifically formulated for metal RV roofing; confirm substrate compatibility on product pages.
- Q: How long does it take for coatings to cure after application? A: Cure times vary by product; some are rain-safe within 30 minutes to a few hours, while full cure may take longer depending on conditions.
- Q: Can I apply on damp surfaces? A: Some formulas permit slight dampness, but always follow the manufacturer’s instructions for best results.
- Q: Do these coatings require a primer? A: Primer requirements depend on the substrate and product; check label recommendations for adhesion and longevity.