Products / Derbigum GP

Derbigum GP is a 4.0 mm (160 mil) smooth-surfaced APP modified bitumen roofing membrane, dual reinforced with a heat resistant non-woven fiberglass mat followed by a polyester scrim. The data sheet lists a roll 33.5 ft long and 39.4 in wide weighing 98 lb for 100 square feet of net coverage. It is applied with PERMASTIC Cold Adhesive or heat welded and meets ASTM D6223, Type I, Grade S. A Derbigum GP-FR version with the same dimensions is described on its data sheet as UL Class A fire-resistant; the sheet does not name the fire test standard.