APP 160 Cool is a smooth-surface APP modified bitumen membrane designed to be heat-welded. It consists of select asphalt, modified with atactic polypropylene, and strengthened with a fiber glass reinforced nonwoven polyester mat made with 100% recycled PET fibers. The combination results in a flexible and durable material. APP 160 Cool is strong and stable, and resistant to natural forces and other factors on the rooftop. It is ideal for both new construction and re-roofing applications as a base ply, cap sheet, or as a flashing sheet in single or multiply APP applications.