FEP (Fluorinated Ethylene Propylene) holds its shape under stress and high temperatures better than PTFE. FEP has a temperature range of -320º F. to +400º F, is FDA compliant, and meets UL 94V0 for flammability. Ideal applications for this fluoropolymer are 3D printers, tank and pump linings, UV applications, and gasketing and mold release. These materials offer excellent electrical insulation, chemical resistance, weatherability and low permeability. Manufactured in the United States. When using this FEP Film with 3D printers we strongly recommend using at least 5 MIL or 10 MIL thick film.