ETFE copolymer is extruded into thin foil to be used in modern architecture. Light and UV-permeability, flame resistance, and the self-cleaning effect are the most important properties which this material offers. ETFE is classified as flame retardant / self-extinguishing. While the foil is extremely light weight, it can handle large weight loads making it an all-around high performance item. The durability and longevity of this product offer an economic advantage. In addition, ETFE is almost completely recyclable, making it an important part of sustainable building practices.