Elastomeric Roofing - FireShield SB

TOPCOAT® FireShield® SB


TOPCOAT® FireShield® SB is a solvent-based, liquid thermoplastic rubber sealant that cures to form a seamless rubber membrane. TOPCOAT® FireShield® SB Membrane will maintain, or may improve UL rating on select roofing or assemblies.** TOPCOAT® FireShield® SB Membrane is designed to enhance your roof system’s protective performance by providing unique fire extinguishing properties. Special fire resistant ingredients in the product react with heat and fire causing a chemical reaction to occur. A non-combustible carbon char layer is formed that retards flame propagation by reducing available oxygen. TOPCOAT® FireShield® SB Membrane is listed by the Cool Roof Rating CouncilSM for solar reflectance and thermal emittance. Its high reflectivity and thermal emittance will help to reduce heat gain to preserve the roof substrate, lower interior temperatures and reduce cooling costs. Sprayable, seamless TOPCOAT® FireShield® systems install fast, without the tear-off, staging, and disposal associated with traditional systems. Comprehensive warranties are available.


TOPCOAT® FireShield® SB is designed to restore BUR, modified bitumen, Hypalon®, TPO, EPDM, metal, wood, and concrete. TOPCOAT® FireShield® SB is formulated to provide maximum fire protection, increase a roof’s reflectivity and to protect the roof substrate from harmful ultraviolet rays. It is highly flexible to accommodate temperature related expansion and contraction of the roof system, a leading cause of roof system failure. Substrate shall not pond water for a period longer than 48 hours. Surface must be free of ponding water, ice, snow and debris prior to application. Do not apply at temperatures below 32°F. Substrate temperatures must be below 120°F when applying product.

  • Highly reflective and listed by the Cool Roof Rating CouncilSM for solar reflectance and thermal emittance

  • Ideal for modified bitumen, Hypalon®, BUR, metal, TPO, wood, concrete, and EPDM

  • Designed to be applied at temperatures as low as 32°F

  • Strong; forms a flexible seal that will not become brittle

  • Flexible; will expand and contract with roof

  • Limited material warranty available for up to 10 years*

  • Guarantees available for up to 10 years*

  • Available in 5-gallon pails, 55-gallon containers, and bulk totes

For application questions, please contact GAF Contractor Services at

Applicable Standards

ASTM D-412, ASTM B-117, ASTM C-794, ASTM G-21, FTMS 141.6271, ASTM D-21-96, ASTM D-1475, ASTM E-1644

Note: Repair leaks promptly to avoid adverse effects, including mold growth

*See warranties and guarantees for complete coverage and restrictions
**Providing the assembly is UL Listed

TOPCOAT® FireShield® SB Membrane Technical Data
Application Rate: 0.5 to 1.5 gallons/100 sq. ft. per coat, varies by system
Application Method: Airless sprayer, roller, or brush
Application Temp (air, surface): 32°F – 120°F
Drying Time (75°F, 50% RH): Approximately 24 hours per coat
Wet Mil Thickness: (1.0 Gallon/100SF) – 16 wet mils
Dry Mil Thickness: (1.0 Gallon/100SF) – 8 dry mils
Total Solids (by weight): 66% ± 3%
Total Solids (by volume): 48% ± 2%
Specific Gravity: 1.23 ± 0.09
Weight per Gallon: 10.2 ± 0.5 lbs
Viscosity (75°F): 11,000 ± 2,000 cps
Tensile Strength: 565 psi ± 10%
Elongation: 550%
Initial Reflectivity: 0.81 (white only)
Aged Reflectivity: 0.71 (white only)
Initial Emissivity: 0.91 (white only)
Aged Emissivity: 0.89, 3 year (white only)

Initial SRI:

101 (white only)
Aged SRI: 87 (white only)
Storage: Store in well-ventilated area at 50°F to 80°F; protect from freezing
Shelf Life: 1 Year
Clean-up: Mineral spirits

Hyphalon® is a registered trademark of DuPont Performance Elastomeric LLC.

Hyphalon® is a registered trademark of DuPont Performance Elastomeric LLC.


All documents are U.S. English unless otherwise noted

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