Products / CertainTeed Flintlastic Base 20

SBS-modified bitumen base ply with fiberglass reinforcement for low-slope roof systems. Flintlastic Base 20 is applied in hot asphalt or cold adhesive and is 2.3 mm (92 mils) thick, 88 lbs per roll, covering 1.5 squares; Flintlastic Base 20 T is the torch-applied version at 3.0 mm (120 mils), 80 lbs per roll, covering one square. CertainTeed lists both as meeting ASTM D6163 Grade S Type I, and the T version also ASTM D4601 Type II.