KEL-F® (PolyChloroFluoroEthylene)

 In Thermoplastics

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KEL-F® Characteristics

KEL-F® is a fluorocarbon-based polymer that is unique in the number of advantages it offers. This PolyChloroFluoroEthylene thermoplastic material can tolerate temperature extremes, is nonflammable, has good chemical resistance and near zero moisture absorption and has strong physical, mechanical and electrical properties.

KEL-F® has a use range of -400 to 400 degrees Fahrenheit and has extremely low outgassing which makes it an excellent choice for aerospace and semiconductor applications. Characteristics include:

  • Get a QuoteOperating temperature range of -400° F to 400° F
  • Nonflammable
  • Good chemical resistance
  • Near zero moisture absorption
  • Extremely low outgassing

Applications for KEL-F®

  • Valves, seals and O-rings
  • Food packaging film
  • Fluid handling systems
  • Sleeve and thrust bearings

Contact a Dielectric Manufacturing knowledge expert to discuss the use of this fluorocarbon-based polymer for your plastic parts. Call 800-367-9122 or email

PolyChloroFluoroEthylene Material Properties

Property Metricunits Englishunits 
Density1.33e3 ‐ 1.43e3kg/m^30.048 ‐ 0.0517lb/ft^3
Yield Strength8.62e7 ‐ 8.96e7Pa12.5 ‐ 13ksi
Tensile Strength7.24e7 ‐ 1.18e8Pa10.5 ‐ 17.1ksi
Elongation0.075 ‐ 0.9% strain7.5 ‐ 90% strain
Hardness (Vickers)2.54e8 ‐ 2.64e8Pa25.9 ‐ 26.9HV
Impact Strength (un-notched)7.9e3 ‐ 9e3J/m^23.76 ‐ 4.28ft.lbf/in^2
Fracture Toughness2.16e6 ‐ 6.4e6Pa/m^0.51.97 ‐ 5.82ksi/in^0.5
Young’s Modulus2.07e9 ‐ 2.76e9Pa0.3 - 0.410^6 psi
Max Service Temperature221 - 241°C430 - 466°F
Melting Temperature375 - 401°C707 - 754°F
Insulator or ConductorInsulatorInsulator
Specific Heat Capability1.39e3 ‐ 1.45e3J/kg °C0.333 - 0.346BTU/lb. °F
Thermal Expansion Coefficient8.1e‐5 ‐ 1.01e‐4strain/°C45 - 56μstrain/°F
CO2 Footprint9.08 - 10kg/kg9.08 - 10lb/lb
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