Skip to content
GAF TOPCOAT Surface Seal SB White Silicone-Style Rubber Roof Coating, 5 gal
Regular price $340.00Orders start at $399 — combine any items to reach the minimum. Learn more
GAF TOPCOAT Surface Seal SB White Silicone-Style Rubber Roof Coating, 5 gal
GAF TOPCOAT Surface Seal SB is a solvent-based, sprayable thermoplastic rubber coating that cures into a seamless rubber membrane over the roof. It is highly reflective, flexible across temperature swings, and comes as a 5-gallon white pail. Use it to add an extra protective layer to commercial roof systems.
Key Features:
- Seamless Membrane: Cures to form a continuous, seamless rubber membrane over the roof surface.
- Highly Reflective: White, highly reflective finish is ENERGY STAR certified (U.S. only) and can dramatically decrease building temperatures.
- CRRC Listed: Listed by the Cool Roof Rating Council for solar reflectance and thermal emittance.
- Flexible Performance: Accommodates temperature-related expansion and contraction of the roof system.
- Sprayable: Solvent-based, sprayable formulation for efficient field application.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | GAF |
| Sell unit | 1 pail, 5 gal |
| Product line | GAF TOPCOAT liquid applied systems |
| Available colors | White |
| Available sizes | 5 gal |
| Material | Solvent-based thermoplastic rubber coating |
| Color / finish | White, highly reflective |
| Approvals | ENERGY STAR certified (U.S. only); Cool Roof Rating Council listed for solar reflectance and thermal emittance |
| Intended use | Protective reflective coating forming a seamless rubber membrane on commercial roof systems |
Coverage & How Much You Need:
Coverage per 5-gallon pail depends on application rate and substrate and is not stated in the available sources; confirm the manufacturer's spread rate before estimating.
Fit and Compatibility:
Part of the GAF TOPCOAT liquid-applied roof coating line for commercial roof systems; use with compatible primers and GAF TOPCOAT system components as specified by the manufacturer.
Frequently Asked Questions (FAQ):
Q: What is included?
A: One 5-gallon pail of white TOPCOAT Surface Seal SB coating.
Q: How is it applied?
A: It is a solvent-based, sprayable coating that cures to a seamless rubber membrane.
Q: Will it help cool the building?
A: Its ENERGY STAR certified (U.S. only) reflectivity can dramatically decrease building temperatures, and it is CRRC listed for reflectance and emittance.
Q: How much area does a pail cover?
A: Coverage is not stated in the available product information; check the manufacturer's technical data for spread rates.
Q: Can it handle roof movement?
A: Yes, the cured membrane is highly flexible to accommodate temperature-related expansion and contraction.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Surface Seal SB is a smart pick when you need an extra protective, reflective layer over an existing commercial roof without a full replacement. Spray application requires solvent-rated equipment and proper ventilation, and substrate must be clean and dry for adhesion. Verify the manufacturer's detail requirements for flashing and terminations before coating; reflective coatings pair well with insulation upgrades to maximize energy savings.
Solvent-based coatings release flammable vapors; apply with proper ventilation, keep ignition sources away, and use appropriate respirator and PPE per the safety data sheet.
Order the 5-gallon pail of GAF TOPCOAT Surface Seal SB coating for a seamless, highly reflective protective membrane.
All third party trademarks, including logos and icons, referenced on our website and product pages remain the property of their respective owners. Unless specifically identified as such, Arbor's use of third party trademarks does not indicate any relationship, affiliation, sponsorship, or endorsement between Arbor Home and the owners of these trademarks. Any references by Arbor Home to third party trademarks are to identify the corresponding third party goods.
