FFKM - Perfluoroelastomer

Clwyd reference FFKM
ASTM classification FFKM
Typical applications
  • Semiconductor
  • Chemical
  • Petroleum
  • ‘O’ Ring applications
  • Exceptional chemical resistance in harsh conditions
  • Thermal stability from -25°C to 320°C
  • Ultimate in sealing performance
  • Poor compression set
  • Can be difficult to process
Available hardness range (Shore A) 70- 95
Upper continuous service temp. 320°C
Min. temp. for sealing applications -20°C
Minimum non-brittle  temp.  -30°C
Tensile strength (up to) 15 MPa
Elongation at break (up to) 250%
Price Bracket Very High
ASTM 1 Oil Excellent
ASTM 2 Oil Excellent
ASTM 3 Oil Excellent
Kerosene Excellent
Liquid B Excellent
Liquid 101 Excellent
Phosphate ester Excellent
Ketone Excellent
Toluene Excellent
Iso-octane Excellent
Methanol Excellent
Acid (weak) Excellent
Acid (strong) Excellent
Base (weak) Excellent
Base (strong) Excellent
Hydrogen sulphide Excellent
Steam Excellent
Ozone Excellent
Radiation Excellent