Elastomeric Roofing - TOPCOAT Liquid Fabric Flashing Grade

TOPCOAT® Flashing - Liquid Fabric


TOPCOAT® Flashing - Liquid Fabric is a light gray, water-based, acrylic flexible liquid fabric seam sealer that does not require reinforcing fabric on properly fastened horizontal seams of metal roofs, therefore significantly less labor than the typical "3-Course" Method. This product can be used to seal properly fastened horizontal seams on metal roofs without the use of Topcoat Flashing Fabric when horizontal seams are properly secured as per product application specifications.


TOPCOAT® Flashing - Liquid Fabric is designed for use on metal, wood, and concrete to provide a strong flexible seal that will not become brittle. Do not apply at temperatures below 42°F. Substrate temperatures must be below 120°F when applying product.

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

  • Flexible; will expand and contract with metal roof

  • A time saver! Reduces horizontal seam labor up to 50%;
    up to 10% on the whole job

  • Ideal for properly fastened horizontal seams on metal roofs

  • Limited material warranty available for up to 10 years*

  • Guarantees available for up to 20 years**

  • Available in 5-gallon pails and 55-gallon containers

For application questions, please contact GAF Contractor Services at

Applicable Standards

ASTM D-412, ASTM G-21, ASTM D-21-96, ASTM D-1475, ASTM E-1644, FTMS141.6271

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

*See warranties and guarantees for complete coverage and restrictions
**When used as part of a multi-ply system

TOPCOAT® Flashing - Liquid Fabric Technical Data
Application Rate: 5 gallons/125 lineal ft. of seam (6" wide)
Application Method: Brush or airless sprayer
Application Temp (air, surface): 42°F – 120°F
Drying Time (75°F, 50% RH):
Approximately 24 hours
Recommended Wet Mil Thickness:
105 wet mils
Recommended Dry Mil Thickness: 60 dry mils
Total Solids (by weight): 71.7 ± 2%
Total Solids (by volume): 55% ± 2%
Specific Gravity: 1.35 ± 0.1
Weight per Gallon: 11.3 ± 0.5 lbs
Elongation: 700%
Viscosity (75°F): 130,000 ± 15,000 cps
Storage: Store in well-ventilated area at 50°F to 80°F; protect from freezing
Shelf Life: 1 Year
Clean up: Water before curing


All documents are U.S. English unless otherwise noted

Commercial Roofing EagleView Commercial Property Owners Portal Architects And Specifiers Green Roof Central


Product Princing and Where to Buy
© Copyright 2018 GAF | Privacy Policy and Legal | GAF Canada | GAF U.S.