ETFE is a copolymer of Ethylene and Tetrafluoroethylene, and is also sold under the TefzelTM trademark. Although not fully fluorinated, ETFE has excellent chemical resistance and can operate continuously at 150°C/300°F. This resin is the toughest of the fluoropolymers and can be applied at film builds up to 1,000 micrometers (40 mils) to provide a highly durable finish. ETFE is available in both water-based liquid and powder forms.