Products / DuraWeld 4S APP

U.S. Ply's smooth-surfaced APP (Atactic Polypropylene) modified bitumen membrane reinforced with a non-woven polyester mat, applied by torch. It is used as a base sheet, interply sheet or cap sheet in modified bitumen roof systems. The data sheet lists a 3.7 mm (145 mil) thickness, 88 lb rolls of 39-3/8 in x 32 ft 9 in, and classification under ASTM D6222 Type I, Grade S. It states the product is UL Classified, FM Approved, listed under Florida Building Code FL-14405 and Texas Department of Insurance RC-123, and Miami-Dade County approved.