Exonic Polymers is a leading extruder of customer Nitrile (Buna-N) rubber profiles. Nitrile is a synthetic rubber elastomers. It exhibits excellent heat resistance, abrasion resistance, and resistance to petroleum. With a proven ability to withstand lubricants, solvents, oil, water, and hydraulic fluids, Nitrile is recommended for use in environments with crude oil, gasoline, propane, petroleum oils and water. 

The polymer has poor weathering, sunlight and ozone resistance properties, so it is best used in enclosed settings. Also, avoid using Nitrile sealing products with highly polar solvents.

Nitrile (NBR) Rubber Advantages & Benefits

  • Excellent solution for sealing applications
  • Good compression set
  • Abrasion resistance
  • Tensile strength
  • Resistance to heat
  • Resistance to abrasion
  • Resistance to water
  • Resistance to gas permeability

Nitrile (NBR) Rubber Properties

Common Name: Buna-N, Nitrile, NBR

ASTM D-2000 Classification: BF, BG, BK - Military (MIL-STD 417): SB

Chemical Definition: Butadiene Acrylonitrile

Specific Gravity: 1.00

Temperature Range

Low Temperature Usage: -30° to -40° F

High Temperature Usage: Up to 275° F

Tensile Strength

Tensile Range: 500-2500 P.S.I. - Very Good

Elongation: 600% Maximum - Good

Durometer (Hardness)

Range: 30-90 Shore A

Resilience / Rebound: Fair - Good

Abrasion Resistance: Good - Good - Excellent

Tear Resistance: Fair - Good

Compression Set: Good

Additional Properties

Aging Weather: Fair - Good

Adhesion to Metals: Fair - Good - Excellent

Solvent Resistance: Good - Excellent

Oil Resistance: Good - Excellent

Heat Resistance: Good

Flame Resistance: Poor

Common Nitrile (NBR) Applications

Oil & Gas

  • Seals
  • Tubing
  • Molded Shapes
  • Rubber - to - Metal bonded components
  • Rubber Connector


  • Gaskets
  • Seals
  • O-rings
  • Carburetor & Fuel pump diaphragms
  • Fuel Systems
  • Hydraulic Hoses
  • Tubing
  • Fuel tank straps


  • Oil resistance applications
  • Low temperature applications
  • Automotive, Marine and aircraft fuel systems
  • Nitrile roll covers
  • Hydraulic hoses
  • Nitrile tubing