FKM sponge

excellent material for sealing, noise reduction and thermal damping

FKM sponge with skin

In harsh environments where chemicals and high temperatures prohibit the use of materials such as cellular EPDM or silicone sponge, FKM sponge with skin is excellent material for sealing, noise reduction and thermal damping.

FKM and FPM both refer to the same elastomer, it is the ASTM designation for brand names such as Viton® by Dupont or Fluorel® by MMM. Other common names are Fluorocarbon or Fluoroelastomer.


Features & Benefits

  • Open cell structure with skin
  • High compressability allows conformation to irregular gaps and shapes
  • Low sealing force required
  • Excellent resistance to ultraviolet light, ozone and high temperatures
  • Excellent chemical resistance
  • Heat resistant up 200°C continous, up to 300°C intermittent
  • Thermal insulation

Chemical resistance

  • Aliphatic and aromatic hydrocarbons
  • Oil
  • Fuels
  • Ozone and Weather
  • Lubricants
  • Animal and Vegetable Oils
  • Acids
  • Hot Water



  • Environmental seal
  • Acoustic seals for use in combination with aggressive chemicals
  • Enclosures requiring low heat transfer
  • Soft wipers

Types of FKM sponge

The standard high density is comparable to a 30° Shore A hardness, low density FKM sponge profiles can be extruded upon request.

High density

  • Hardness : 30° Shore A
  • Tear strength : 3 Mpa
  • Ultimate elongation : 250%
  • Permanent set : 27%

Low density

  • Hardness : 20° Shore A
  • Tearstrength : 3 Mpa
  • Ultimate elongation : 200%
  • Permanent set : 45%



  • Rectangular and square profiles
  • O-ring profiles


  • FKM-chaulk for splicing FKM sponge and solid rubber



Keeping up with COVID-19

This rapidly evolving corona-virus (COVID-19) has imposed an unsettling, fluid situation upon our community and its businesses. While the team here still aims to maintain a “business as usual” approach, we are making a number of significant changes to our operations to account for a situation that is far from normal. Governmental orders in the fight against the spread of the corona-virus (COVID-19) lead to the partial or complete closing of several production lines or designation of lines for the production of crucial parts for essential industries like food and pharma. As a direct result confirmed or usual lead times may not be met. In the current situation the delay cannot be determined. With the closing of factories in certain areas we need to make some changes to standard terms. To can keep operational and safeguard our financial position we must change certain terms. These will be announced and confirmed upon receipt of orders. Apologies for the inconvenience. Take care of yourself so you can take care of others!!