Our most frequently used film material for load-bearing walls, roofs, or claddings, is the co-polymer structure Ethyltetrafluoroethylene (ETFE). ETFE foils can meet the highest aesthetics standards, combined with environmental friendliness. This allows a variety of designs to be created, which display incomparable lightness and elegance and can be regarded as expressing a unique architectural language. ETFE has high transparency and excellent mechanical properties (high tensile and tear strength) and can therefore be used for load-bearing applications. ETFE is one of the most stable chemical compounds in existence and is thus ideal for outside use. It is self-cleaning, resistant to environmental attack, possessing heat and weather resistant as well as long-term UV-resistance. ETFE does not absorb short-wave UV radiation and consequently does not become embrittled or subject to colour change as a function of age.