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FKM (Fluor rubber, also known as Viton)

FKM materials have conquered many applications in which high thermal and / or chemical resistance is required. FKM also has excellent resistance to ozone, weathering and ageing. Very low gas permeability, FKM is recommended for vacuum applications.

FKM has good resistance to:

  • mineral oil-based oils and greases
  • aliphatic hydrocarbons
  • aromatic hydrocarbons
  • chlorinated hydrocarbons
  • hydraulic fluids HFD
  • vegetable and animal oils and fats
  • silicone oils and silicone greases
  • fuels
  • non-polar solvents
  • ozone, weathering, ageing

FKM is not resistant to:

  • glycol-based brake fl uids
  • polar solvents (e.g., acetone)
  • superheated steam
  • hot water
  • amines, alkalis
  • low-molecular organic acids (e.g., acetic acid)

Application temperature range:

  • -15 to +200°C
  • down to -50°C is realistic with special grades