TOPCOAT® FlexSeal is a white solvent-based synthetic elastomeric sealant. FlexSeal is extremely flexible and durable. Like all solvent-based products, the surface must be completely free of moisture before application.
FlexSeal is designed for use on metal, concrete, wood, copper, SBS, APP, EPDM, and BUR substrates.
FlexSeal is a universal sealant and can be used in multiply applications. Use the regular “self-leveling grade to line gutters and seal seams on metal roofs. This grade can also be used with GAF Flashing Fabric on penetrations, curbs and seams.
Use the caulk grade for sealing termination bars, skylights, clamping rings, penetrations and edge metal. Can be used for cold weather application. This product is easiest to apply at temperatures above 32°F. Substrate temperatures must be below 120°F when applying product.
For application questions, please contact GAF Contractor Services at
|Technical Data||FlexSeal Sealant||FlexSeal Caulk Grade Sealant|
|Application Rate:||5 gallons/125@6”||Approximately ¼ - 3/8 inch (6-10mm) bead|
|Application Method:||Trowel or stiff bristle brush||Caulk Gun|
|Application Temp (air, surface):||32°F – 120°F(0°C- 48.9°C)||32°F – 120°F (0°C- 48.9°C)|
|Drying Time (75°F, 50% RH):||Approximately 24 hours||24- 48hrs; Skins in less than 1 hour; Full Cure- approx. 48 hours.|
|Recommended Wet Mil Thickness:||85 wet mils||-|
|Recommended Dry Mil Thickness:||50 dry mils||-|
|Total Solids (by weight):||77% ± 2%||77% ± 2%|
|Total Solids (by volume):||66% ± 2%||-|
|Specific Gravity:||1.24 ± 0.1||1.24 ± 0.1|
|Weight per Gallon:||10.3 ± 0.5 lbs||10.3 ± 0.5 lbs|
|Viscosity (75°F):||600,000 ± 100,000 cps||1,200,000 cps ± 10%|
|LV - Viscosity (75°F):||150,000 ± 15,000 cps||-|
|Tensile Strength:||485 psi ± 10%||>250 psi (>1.72 N/sq mm)|
All documents are U.S. English unless otherwise noted