Fluorocarbon Rubber (FKM)

Fluorocarbon Rubber (FKM) is also commonly known as Viton. Fluorocarbon rubbers are a family of material based on copolymers and terpolymers. The fluorine atoms in their molecular structure make these rubbers highly resistant to many chemicals as well as making them resistant to high temperatures. These rubbers are some of the most suitable choices for high temperature applications as they offer excellent heat resistance of up to 300°C.

Key Properties of Fluorocarbon Rubber:

  • Suitable for use at very high temperatures
  • Resistant to many chemicals
  • More resistance to burning than non-fluorinated rubbers


  • Poor low temperature capabilities in the region of -10°C are generally exhibited, however special
  • Low temperature grades are available.

Operating Temperature Range: -10 to +300 °C

  • Can survive continuous service at ~ 205°C
  • Can last for 3000 hours at 232 °C
  • 1000 hours at 260 °C
  • 240 hours at 288 °C
  • 48 hours at 316 °C

Chemical Compatibility:

  • Generally wide-ranging chemical resistance
  • Excellent resistance to oils, fuels, lubricants, and most mineral acids
  • Unsuitable for use with phosphate esters and ketones
  • Exhibit resistance to degradation by greater variety of fluids and chemicals than any non-fluorinated elastomer
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