Nitrile Rubber exhibits:

Excellent Oil & Gasoline Resistance • Superior Petroleum-Based Hydraulic Fluid Resistance • Very Good Alkalis and Acids Resistance

WARCO Nitrile Rubber (NBR/BUNA-N)

Select any of these drop down options to learn more about Nitrile Rubber.

General Information

Common Name:
Nitrile, Buna-N, NBR

Chemical Name:
Acrylonitrile-butadiene

Generally Resistant To:
Gases, Aliphatic Hydrocarbon, Oils and Fuels

Generally Attacked By:
Ketones, Ozone, Sunlight, Aromatic Oil, Flame, Weather

ASTM D 2000 / SAE J200 Classification:
BF, BG, BK, CH

MIL-R-3065 / SAE J-14 / MIL-STD-417 Classification:
SB

ASTM D-1418 Designation:
NBR

Elongation:
400% to 600%

Hardness Range (Durometer Shore A):
35 to 90

Compression Set:
Good

Rebound Rating:
Good

Flex Cracking Resistance:
Good

Abrasion Resistance:
Good to Excellent

Tear Resistance:
Good

Impact Resistance:
Fair to Good

Flame Resistance:
Poor

Minimum Service Temperature:
-30°F to -70°F

Maximum Service Temperature:
+220 to +280°F

Recommended Shelf Life:
5 to 10 years

Weather Resistance:
Poor

Sunlight Resistance:
Poor

Ozone Resistance:
Poor

Oxidization Resistance:
Good

Water Resistance:
Good to Excellent

Steam Resistance:
Fair

Gas Permeability:
Fair to Good

Radiation Resistance:
Good, 1 x 105 Ga Gy
Fair, 6 x 105 Ga Gy

Acetone:
NOT RECOMMENDED

Amonium Hydroxide:
NOT RECOMMENDED

Carbon Dioxide:
RECOMMENDED: Little or Minor Effect

Chlorine:
DRY: – – –
WET: – – –

Fluorine (Liquid):
– – –

Fuel Oil:
RECOMMENDED: Little or Minor Effect

Gasoline:
RECOMMENDED: Little or Minor Effect

Hydrochloric Acid 37%:
HOT:NOT RECOMMENDED
COLD: Minor to Moderate Effect

Hydrochloric Acid Concentrate 37%:
HOT: NOT RECOMMENDED
COLD: NOT RECOMMENDED

Kerosene:
RECOMMENDED: Little or Minor Effect

Methyl Ethyl Ketone:
NOT RECOMMENDED

Mineral Oil:
RECOMMENDED: Little or Minor Effect

Naptha:
Moderate to Severe Effect

Natural Gas:
RECOMMENDED: Little or Minor Effect

Nitric Acid:
Concentrate: NOT RECOMMENDED
Dillute: NOT RECOMMENDED
Red Fuming: NOT RECOMMENDED

Petroleum:
Below 250: RECOMMENDED: Little or Minor Effect
Above 250: Moderate to Severe Effect

Phosphoric Acid:
20%: Minor to Moderate Effect
45%: NOT RECOMMENDED

Propane:
RECOMMENDED: Little or Minor Effect

Skydrol:
Skydrol 500: NOT RECOMMENDED
Skydrol 7000: NOT RECOMMENDED

Sodium Hydroxide:
Minor to Moderate Effect

Sulfuric Acid:
Concentrate: NOT RECOMMENDED
Dillute: NOT RECOMMENDED
20% Oleum: NOT RECOMMENDED

Toluene:
NOT RECOMMENDED

Transformer Oil:
RECOMMENDED: Little or Minor Effect

Vinegar:
Minor to Moderate Effect

  • Actual shelf life could vary dramatically based on storage conditions
  • Store in a cool, dry place with temperature below 75°F
  • Keep away from direct heat or open flames
  • Avoid contact with solvents or other fluids
  • Do not store in direct sunlight
  • Keep products wrapped or sealed to minimize the absorption of moisture
  • Store in a relaxed condition free from tension, compression or other deformation

See Rubber Storage Conditions for more information about how to properly store your rubber products

Nitrile Rubber (BUNA-N) Products

Nitrile Rubber (NBR) is the polymer of choice for applications requiring oil and solvent resistance. Nitrile has very good oil and gasoline resistance, superior resistance to petroleum-based hydraulic fluids, a wide range of service temperatures, good resistance to hydrocarbon solvents, and very good resistance to alkalis and acids.

Our Nitrile Rubber (BUNA-N) Products are available in Premium, Commercial & Spec Grades or as a specialty product.

Please Select a Nitrile Rubber (BUNA-N) Product Below:

Premium Grade

Premium Nitrile

Durometer: 40 to 90 Temperature Range: -30°F to +220°F
Specs: ASTM D2000 M1BG

Specification Grade

MIL-R-6855 Class 1

Durometer: 40 to 80 Temperature Range: -50°F to +220°F
Specs: MIL-R-6855 Class 1

MIL–R–3065 SB

Durometer: 40 to 80 Temperature Range: -40°F to +220°F
Specs: MIL-R-3065 SB

AMS 3215 Fuel Resistant (Nitrile)

Durometer: 70 Temperature Range: -30°F to +220°F
Specs: AMS 3215

ASTM D2000 M5BG

Durometer: 40 to 70 Temperature Range: -40°F to +220°F
Specs: ASTM D2000 M5BG

Nitrile MIL–G–1149

Durometer: 50 Temperature Range: -30°F to +200°F
Specs: MIL-G-1149

MIL–R–2765

Durometer: 40 Temperature Range: -50°F to +220°F
Specs: MIL–R–2765

Specialty Nitrile

WARCO White® FDA Nitrile

Durometer: 45 to 85 Temperature Range: -30°F to +220°F
Specs: ASTM D2000 M1BG, FDA Approved Ingredients per 21 CFR 177.2600

Transformer Oil Nitrile

Durometer: 60 to 70 Temperature Range: -20°F to +250°F
Specs: ASTM D200 5BG, General Electric

Data presented here was gathered from several sources including Uniroyal Chemical Company, Inc., The Los Angeles Rubber Group, Inc., and Compass Publications

Our rubber products are a proprietary blend of various polymers formulated to meet stated physicals and specifications. The named product polymer is not necessarily the primary polymer representing the highest percentage of the polymer blend. Determination of the suitability of the goods for the uses and applications contemplated by Buyer and others shall be the sole responsibility of the Buyer or user. No guaranty is given with respect to length of service on any particular application. Suggestions or recommendations made by Seller in its product literature concerning uses or applications of the goods are believed to be reliable, but Seller makes no warranty or guaranty of results to be obtained since the conditions of the use and application by Buyer and others are beyond Seller’s control.

View complete Terms & Conditions of Sale for suitability of use and formulations