Nitrile Rubber (NBR)

This elastomer is a copolymer of butadiene and acrylonitrile and is used for the majority of conventional fluid sealing application.
Standard colour: black.


  • good resistance to mineral oil and grease
  • good resistance to water and radiator fluid


  • poor resistance to high-alloyed hypoid oil
  • poor resistance to ozone, weathering and sunlight
  • not resistant to automotive brake fluid (glycol based)
  • poor resistance to polar fluids (ketones, ethers, esters)
  • poor resistance to chlorinated hydrocarbons (carbon tetrachloride, trichloroethylene)
  • poor resistance to aromatic solvents