PENNCOAT 600 Membrane is a 60 mil (1.5 mm) thick prefabricated self adhesive reinforced sheet laminate membrane. It is constructed of a woven fiberglass core that is sandwiched between layers of polymer modified high tack rubberized asphalt with an integral chemical resistant Mylar top film. An embossed release film is incorporated onto the back of the sheet for easy release without tears or splits. PENNCOAT 600 is easily rolled into place over properly prepared surfaces that have been primed with PENNCOAT 601. Each roll is 50 ft (15.2 m) in length x 4 ft (1.2 m) in width for easy handling on the jobsite.