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Fluoroelastomers are a family comprising copolymers of hexafluoropropylene, vinylidene and terpolymers of tetrafluoroethylene. Viton is a common brand of fluoroelastomers and widely used in high temperature sealing and chemical resistant applications. Fuoroelastomers are known as FKM, categorized under ASTM designation. FKM tubing or hoses are recommended in automotive and other transportation applications. FKM O-rings are alternative to Nitrile rubber products in automobile engines with much higher temperature and chemical resistant applications.

Fluoroelastomers Information and Specs
General Information
  • Common Name: Viton®
  • Chemical Name: Fluoroelastomer
  • Resistant To: Acids, Hydrocarbons, Oils, Gasoline, Water, Heat, Fuels, Chemicals, Weather, Sunlight, Oxidation and Ozone
  • Attacked By: Ketones, Solvents, High pH Chemicals and Low Molecular Weight Carbonyls
  • ASTM D 2000 / SAE J200 Classification: HK
  • MIL-R-3065 / SAE J-14 / MIL-STD-417 Classification: TB
Physical Properties
  • Elongation: 100% to 500%
  • Hardness Range (Durometer Shore A): 60 to 90
Mechanical Properties
  • Compression Set: Very Good
  • Rebound Rating: Poor
    • Cold: Fair to Good
    • Hot: Good to Excellent
  • Flex Cracking Resistance: Good
  • Abrasion Resistance: Good
  • Tear Resistance: Fair to Good
  • Impact Resistance: Good
  • Flame Resistance: Very Good to Excellent
Thermal Properties
  • Minimum Service Temperature: -20°F to -70°F
  • Maximum Service Temperature: +600°F
Environmental Resistance
  • Recommended Shelf Life: 20 years
  • Weather Resistance: Excellent to Outstanding
  • Sunlight Resistance: Good to Outstanding
  • Ozone Resistance: Outstanding
  • Oxidization Resistance: Outstanding
  • Water Resistance: Very Good
  • Steam Resistance: Poor to Good
  • Gas Permeability: Fair to Good