VITON (FKM)

Viton FKM is a type of synthetic rubber known for its excellent and widely used properties, depending on its formulation.

This Viton plastic is one of the most popular rubbers for sealing applications and is produced either as a copolymer or a terpolymer.

FKM elastomer was first introduced in the 1960s using Perfluoromethyl Vinyl Ether (instead of HFP). Its high thermal stability is due to strong C-F bonds, making it highly resistant to heat and requiring significant energy to break.

Viton’s chemical resistance depends on its fluorine content—commonly 66%, 68%, or 70%. Higher fluorine content provides better resistance to fluids and acidic solutions such as gasoline, petroleum, and gas.

Different Grades of Viton:
Searching online, you may see terms like FKM, FPM, or Viton. While related, they have distinctions:

• FKM: Defined according to ASTM (American Society for Testing and Materials) standards.

• FPM: An international standard category for fluorinated elastomers.

• Viton: A brand name registered by DuPont for this fluorinated rubber.

Features of Viton FKM:

• Very low gas permeability, even lower than butyl rubber.

• Suitable for aerospace and industries with harsh operating conditions.

• Resistant to corrosion, chemicals, industrial liquids, oils, fuels, lubricants, most mineral acids, and fire-resistant hydraulic fluids.

• Flexible, lightweight, and provides good thermal insulation.

• Peroxide-cured Viton shows improved resistance to water, steam, and acids.

• Originally produced in various colors (gray, green, brown, purple), Viton can now be manufactured in any desired color for different applications.