Products / DynaFast 250 HW

DynaFast 250 HW is a heavy-duty polyester-reinforced SBS modified bitumen base or ply sheet for heat welding in mechanically fastened systems. The data sheet (RS-4692, 1-21) says it meets ASTM D6164 Type II Grade S and is FBC approved, and prints a thickness of 157 mil and a 105 lb roll covering 95.8 square feet, made in Macon, Georgia. It lists a Peak Advantage guarantee of up to 30 years in most 2 to 5 ply JM SBS systems.