Rubber HNBR

Rubber HNBR enjoys excellent elatic properties, resistance to mechanical stress and abrasion, and resistance to ageing.
These variations are most appreciable at high temperatures (150°C).
The range of fluids with which this rubber is compatible is also extended.

General Features: Rubber HNBR

Temperature range: (-30) -15 to 100 (110) C°

Shore hardness: 40 ÷ 90 / Specific weight: 1.15 ÷ 1.50

  • Excellent mechanical properties
  • Fair resistance to permanent deformation
  • Resilience variable from poor to high
  • Excellent abrasion resistance
  • High air and gas impermeability
  • Good resistance to UV radiation
  • Inexistent flame resistance

Trade names: Rubber HNBR

Therban Bayer (Bayer AG), Acrylonitrile/butadiene copolymer (ACN content approx. 18% to 45%) with hydrogenated double bonds. Hydrogen is added to the NBR rubber compound.

Compatibility and Chemical Behaviour: Rubber HNBR

Good resistance:

  • Oli minerali, vegetali e animali
  • Oli e grassi di silicone
  • Fluidi per la refrigerazione
  • Idrocarburi alifatici, aromatici e clorurati
  • Fluidi a base di glicole
  • Solventi polari

Medium resistance:

  • Oxygen, Ozone, Nitrogen
  • Oil-based and silicone ester-based hydraulic fluids
  • Various types of Freon
  • Alcohols (except benzyl)
  • Concentrated alkaline solutions up to 50°C
  • Dilute acid solutions
  • Xylene and toluene
  • Synthetic lubricants based on diesters

Poor resistance:

  • Benzene and chlorinated hydrocarbons
  • Phosphate ester-based hydraulic fluids
  • Various glycol-based brake fluids
  • Phenol
  • Ketones and esters
  • Concentrated strong mineral acids and hot dilute alkaline solutions.

Specialising in industrial seals

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Customer request

We carefully evaluate each of our customers' requests in order to offer customised, quality solutions.

Technical consultancy

Proven experience in various manufacturing sectors: mechanical engineering, automotive, hydraulics, petroleum and pharmaceuticals. We offer tailor-made solutions, guaranteeing high quality and customer satisfaction.


Our production includes both standard and customised production, even with special compounds. we produce customised seals based on customer drawings within a short time frame.

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Timeliness of delivery thanks to a large warehouse that enables rapid dispatch and delivery.


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