Hydrogenated Nitrile (HNBR)

Hydrogenated Nitrile Rubber (HNBR) or Highly Saturated Nitrile Rubber (HSN) as the name suggests is a synthetic polymer made by the Hydrogenisation of Nitrile Rubber.

HNBR has better heat, chemical, oil resistance & superior physical properties when compared with standard NBR.

Acrylonitrile content (ACN) differs from 19% to 50% in HNBR. Generally for O’Rings and Seals 36% ACN content HNBR is used to achieve a balance in Low Temperature Properties & Oil/Fuel Resistance.

HNBR readily fills the gap between NBR & FKM Rubbers owing to its broad temperature range, oil resistance & superior mechanical properties.


  • Good resistance to Petroleum Sour Gas & Ozone
  • Good Resistance to Mineral & Vegetable Oils
  • Good Resistance to Hydraulic Fluids
  • Good Resistance to Dilute Acids & Bases
  • Good Resistance to Water & Steam


  • Poor resistance to Strong Acids
  • Poor resistance to Ketones
  • Poor Resistance to Chlorinated Hydrocarbons
  • Poor Resistance to Flame
  • Poor Resistance to Esters & Ethers