Well known high performance rubber. Has especially excellent resistance to high temperatures, ozone, weather, oxygen, mineral oils, fuels, hydralic fluids, aromatics and many other organic solvents and chemicals.

Actum Sweden AB has its own FKM compound: V7015AA

ApprovalAuthoritySvc. Temp.CompoundElastomerHardnessColor
UL-60~200°cV7015AAFKM perox.70±5 Shore ABlack

Cure system

Standard FKM compounds are Bisphenol cured. Peroxide cured FKM compounds possess better acid solution resistance than the bisphenol cured ones and can thus replace litharge cured applied in acid solution.  Some lubricants adds a few organic amide or amine, under these conditions choosing peroxide curing system Viton™ will be better than bisphenol curing.


FKM has excellent resistance to high temperature, solvent, oils, flame, weather, chemicals and is usually applied in automotive, chemical processing, aerospace and many other industries.

  • AFLAS® (TFE/propylene polymer) is more base and steam resistant than other general Vitons. It can be used in amine, amide and some bases.
  • Viton™ is a registered trademark of Chemours Fluoroelastomer.
  • AFLAS® is a registered trademark of AGC Chemicals. ®

General Information

  • ASTM D 1418 Designation: FKM
  • ISO/DIN 1629 Designation: FKM
  • ASTM D2000 / SAE J 200 Codes: HK
  • Standard Color(s): Black
  • Hardness Range: 50 to 90 Shore A
  • Relative Cost: High

Service Temperatures

  • Standard Low Temperature: -26°C / -15°F
  • Standard High Temperature: 250°C / 482°F
  • Special Compound Low Temperature: -40°C / -40°F
  • Special Compound High Temperature: 275°C / 527°F
Performs well inDoes not perform well in
Petroleum productsKetones
Fuel or blend with methanol or ethanolLow molecular weight organic acids
(formic and acetic acids)
Diesel or blend with biodieselSuperheat steam
Mineral oil and greaseLow molecular weight esters and ethers
Silicone oil and greasePhosphate ester based hydralic fluids -Skydrol®
High vacuum
Ozone, weather and very high temperature air
Strong acid