General Grade

Nitrile Butadiene Rubber commonly referred to as NBR, Nitrile or BUNA. Good physical characteristics and chemical resistance to the most common hydraulic fluids makes NBR an excellent sealing material. NBR materials are one of the most used elastomers in sealing applications.

FDA Grade

NBR products are also available with FDA grade in white colour, which is approved for usage in applications contact with foodstuffs.

Main Applications

Static and Dynamic seals, wipers, O-rings, Gaskets, Flange seals, rotary seal, rubber energisers. Applications in food industry.

Physical properties

Density DIN 53479 g/cm3 1.32
Hardness DIN 53505 Shore A 85
Tensile strength DIN 53504 N/mm2 17.2
Elongation at Break DIN 53504 % 171
Modulus 100% DIN 53504 N/mm 10.2
Tear Strength DIN 53507B N/mm 3.3
Compression Set: 70h/RT DIN 53517A N/mm 6.0
Compression Set: 22h/70°C DIN 53517A % 6.7
Compression Set: 22h/100°C DIN 53517A % 6.8
Min. service temperature °C -25
Max. service temperature °C 100

Physical properties

  • Water up to 70° - R
  • Water up to 90° - S
  • Steam - U
  • HFA, HFB, HFC Fluids - R
  • HFD Fluids - U
  • Minerals / Vegetable Oils - R
  • Silicone oils - S
  • Biodegradable Oils - S
  • Diesel Fuel - R
  • Gasoline Fuel - S
  • Alcohols -R
  • Ozone, Oxygen - U
  • Air up to 100° - R
  • Air up to 150° - U

Key to chemical resistance: R=Resistance S-Suitable U=Unsuitable

Analysis and Evaluation

The mentioned properties are only valid for test pieces of the corresponding ISO, Din, and ASTM standards. They cannot be directly related to seals, gaskets and other sealing products and should be used only as a general guide. Customer required properties for the rubber material can be produced and analysised.