Products / DynaLastic 250

DynaLastic 250 is a heavy-duty polyester-reinforced SBS modified bitumen cap or flashing sheet surfaced with ceramic-coated granules that may be installed in Type IV asphalt or an approved JM adhesive. The data sheet (RS-4109, 9-23) says it meets ASTM D6164 Type II Grade G, prints a thickness of 165 mil and a roll about 1 m wide by 10 m long covering 95.8 square feet at 115 lb, and gives a printed solar reflectance index of 25 for the standard white granule. It lists a Peak Advantage guarantee of up to 30 years in most 2 to 5 ply JM SBS systems.