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Material Information

Tefzel® is DuPont’s brand name for the material called ETFE (Ethylene TetraFluoroEthylene). ETFE belongs to the fluoropolymer family. Fluoropolymers in general are known to have high chemical resistance, a wide range of operating temperatures, resistance to weathering, low friction, and electrical and thermal insulation. ETFE in particular was produced to offer a material that provides both corrosion resistance and mechanical strength over a wide temperature range. Tefzel® ETFE offers high purity, high impact strength, excellent chemical and abrasion resistance, good resistance to permeability, and resistance to radiation and heat sterilization. These properties are true for Tefzel® ETFE over a wide range of temperatures (-300 to 300º F). Tefzel® ETFE is available in the form of sheet, rod, and film.


  • Pump housings and pipe linings
  • Wire and cables
  • Cryogenic applications
  • Valves
  • Compressors
  • Impellers for abrasive slurries
  • Films
  • Electrical components
  • Gaskets
  • Bearings
  • Fluid handling or chemical processing equipment
  • Wet bench equipment
  • Military/defense equipment components


  • Excellent chemical and abrasion resistance
  • High purity
  • High impact strength
  • Excellent dielectric insulation properties
  • Wide range of operating temperatures
  • Weathering and corrosion resistance
  • Very low moisture absorption
  • Resistance to radiation and heat sterilization
  • Low friction
  • Good thermal insulator


PhysicalAstm Test MethodETFE (Tefzel®)
Density (lb/in^3)D7920.061
Specific GravityD7921.7
Water Absorption @ 24 hours (%)D570
Tensile Strength (PSI)D6386,100
Tensile Modulus (PSI)D638
Tensile Elongation at Break (%)D638300
Flexural Strength (PSI)D790
Flexural Modulus (PSI)D790145,000
Compressive Strength (PSI)D6952,470
Compressive Modulus (PSI)D695
Izod Impact (Notched), ft-lb/inD256No Break
Shore D HardnessD785D67
Coefficient of Thermal Expansion,
Heat Deflection Temperature 264 psi, ºFD648
Melting Point, °FD3418512
Continous Service Temp (Operating), °F311
Thermal Conductivity, BTU-in/hr-ft² °FF433
Flammability RatingUL94VO
Dielectric Strength, Short Term,
(Volts/Mil) @ .125″ Thick
Volume Resistivity (ohm/square)D25710^17
Dielectric Constant at 1 MHZD1502.5
Dissipation Factor at 1 MHZD1500.006

Disclosure: The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers’ complete material property datasheets. All values at 73°F (23°C) unless otherwise noted.


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