The APP 180 is a granule-surface APP modified bitumen roofing membrane designed to be heat welded. It is ideal for both new construction and re-roofing applications as a cap sheet or as a flashing sheet in single or multi-ply APP applications. It consists of select asphalt, modified with atactic polypropylene, and strengthened with a fiber glass reinforced polyester non-woven mat made with 100% recycled PET fibers which results in a flexible and durable material that is resistant to natural forces and other factors on the rooftop.