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Nitrile (NBR) Butadiene Rubber Seals for Industrial and Domestic Use

Nitrile Butadiene Rubber (NBR) is usually considered as the backbone of the industrial and automotive rubber products industries. NBR is actually a complex family of unsaturated synthetic rubber copolymers of acrylonitrile (ACN) and butadiene. The physical and chemical properties of NBR depend on the percentage of acrylonitrile in the base polymer. Generally, this type of synthetic rubber is resistant to oil, fuel, grease, water, air and flame retardant liquids (HFA, HFB, HFC).

Today, NBR is one of the most popular sealing elements due to its strong engineering properties. NBR rubber seals, can be used in hydraulic liquid, gas oil, silicon oil, animal and vegetable oils and fats as well as hot and cold water.

Beneficial Aspects of Nitrile Rubber Seals

The following aspects of NBR have made it the most widely used elastomer in the sealing industry today:

  • Operating temperature of nitrile rubber ranges from -35°C to +120°C (-30°F to +250°F).
  • Ability to be compounded for numerous applications.
  • Certain grades of nitrile rubber when compounded with PVC offer better resistance to ageing, flame, petrol, and ozone.
  • Carboxylated grades of NBR rubber seals (XNBR) have improved physical properties as well as resistance to higher temperatures.
  • Potable water (WRC/WRAS) compounds of NBR are suitable for use in the food and pharmaceutical industries.
  • Fuel and oil resistant O-rings are created from nitrile based compounds for several military rubber specifications.
  • NBR rubber seals with high acrylonitrile content offer better oil resistance.
  • Low temperature flexibility and resilience are achieved with low acrylonitrile content.
  • Special low-temperature compounds of nitrile rubber are used for mineral oil-based fluids.

SSP Manufacturing, Inc. is a pioneer in the sealing industry. We offer an extensive range of nitrile rubber sealing solutions that include food grade seals, water-cut seals, oil seals, O-rings and industrial seals. Apart from these standard profiles, SSP also offers custom seals and parts. Our unique processes for the manufacture of NBR rubber seals help us create seals and parts to meet your specific applications.


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SSP Manufacturing, Inc.

Phone: 1-908-852-3125     Email: gm@sspseals.com

Data Sheet for NBR (Nitrile Butadiene Rubber)

Property Specification Value
Hardness ISO 868 85 +/- 5 shore
Modulus 100% DIN 53 504 Greater than or Equal to 1595 psi
Tensile strength DIN 53 504 Greater than or Equal to 2465 psi
Elongation at break DIN 53 504 Greater than or Equal to 150%
Tear Strength DIN 53 515 Greater than or Equal to 102 lbf/inch
Specific Gravity ISO 1183 1.28 g/cm3
Rebound Elasticity DIN 53 512 Greater than or Equal to 20%
Abrasion DIN 53 516 100 mm3
Compression set ISO 815 Less than or Equal to 5%
70 deg. C / 24h @ 25% deflection
Compression Set ISO 815 Less than or Equal to 6%
100 deg. C / 24h @ 25% deflection
Min. Service Temperature -22 deg. F
Max. Service Temperature 230 deg. F
Max. Temperature Water / Steam
Max. Temperature Hot Air (short)

NBR (Nitrile Butadiene Rubber) is used mainly in applications where the seals are in constant contact with grease and mineral oil. Since this material is abrasion resistance, it can also be used in demanding applications as seen in shock absorbers. NBR is an inexpensive material, which has led to its popularity in several industries.
This material can be 'FDA Approved' on Request.
FDA Approved Seals & Gaskets

pdf  MSDS SSP SHEET NBR