FEP (fluorinated ethylene propylene) is a relatively soft thermoplastic produced by the copolymerization of tetrafluoroethylene and hexafluoropropylene. Despite its softness, FEP is chemically inert and has a low dielectric constant over a wide frequency range. It offers a very high degree of stress-crack resistance, a low coefficient of friction, exceptional dielectric properties and heat resistance. FEP retains its properties at temperatures ranging from -454° F to 400° F. FEP is highly transparent, with good transmittance of ultraviolet and visible wavelengths. It weathers well over the long term and has excellent resistance to ozone and sunlight. Its refractive index is the lowest of all thermoplastics, and its light reflection is low (the same as water). FEP also meets FDA specification 21CFR.177.1550 and is USP Class VI approved. Typical FEP applications include linings for pipe and chemical processing equipment, roll covers, aircraft wire, plenum cable, fire alarm cable, and well logging cable.

Key Properties
  • Chemically inert
  • Resistant to ozone, ultraviolet light and weather
  • Low refractive index
  • FDA approved
  • Highly transparent
Standard Shapes and Forms

Sheet: .125” – 2” thick

Rod: .125” – 2.75” diameter

Other Forms: Flexible Tubing, Heat Shrink Tubing, Welding Rod, Roll Covers and Film

The range of sizes and shapes are grade specific, minimums may apply please contact us for more information.