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Viton O-rings


FKM (Viton®) O-rings have excellent chemical resistance and can be used at temperature range of between 15°C and 200°C. Although generally more expensive than NBR (Nitrile) O-rings, FKM has found wide acceptance in the aircraft, automotive and chemical industries.

The terms FPM, FKM and Viton® can lead to incorrect interpretations. These designations stand for one single base material: fluorocarbon rubber.

Polymax is also able to supply specially compounded FKM O-rings meeting Norsok M710, FDA, USP Class VI, UL94 V0, EN549, Viton® A, B, G, GF, GLT, GFLT, ETP standards on special request. Please contact us for further information.


Temperature Range

  • Up to 200°C (Intermittent)
  • Down to -15°C
  • Recommended temperature range -10°C to +180°C

    Chemical resistance

    • Mineral oil and grease, ASTM oil No. 1, and IRM 902 and IRM 903 oils
    • Non-flammable hydraulic fluids (HFD)
    • Silicone oil and grease
    • Mineral and vegetable oil and grease
    • Aliphatic hydrocarbons (butane, propane, natural gas)
    • Aromatic hydrocarbons (benzene, toluene)
    • Chlorinated hydrocarbons (trichloroethylene and carbon tetrachloride)
    • Gasoline (including high alcohol content)
    • High vacuum
    • Very good ozone, weather and aging resistance

    Not compatible with:
    • Glycol based brake fluids
    • Ammonia gas, amines, alkalis
    • Superheated steam
    • Low molecular weight organic acids (formic and acetic acids)


Non-standards & Approvals

We are able to supply specially compounded O-rings. Contact us for further information +44 (0)14204 72000.


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