NBR Chemical Resistance Chart

NBR (Nitrile Butadiene Rubber) is the industry standard for oil and fuel resistance. Also known as Buna-N, it's the most widely used elastomer for hydraulic seals, O-rings, and fuel system components.

800+ chemicals tested 20°C & 50°C data Oil resistant

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Excellent (A)

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Good (B)

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Limited (C)

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Not Recommended (D)

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Chemical	Concentration	20°C	50°C	CAS

NBR Properties

Full Name Nitrile Butadiene Rubber

Also Known As Buna-N, Nitrile

Max Temperature 120°C (248°F) continuous

Min Temperature -30°C (-22°F)

Hardness Range 40–90 Shore A

Oil Resistance Excellent

FDA Grades Available

Cost Low (most economical)

Common Applications

Fuel Systems

Fuel hoses, tank seals, gasoline pumps, diesel systems

Hydraulics

Hydraulic seals, O-rings, cylinder seals, pumps

Automotive

Engine seals, transmission seals, oil pan gaskets

⚠️ Not Recommended For

NBR degrades when exposed to:

Ozone and UV exposure (outdoor use)
Ketones (acetone, MEK)
Esters and ethers

Strong acids
Chlorinated hydrocarbons
Brake fluid (glycol-based)

Tip: For outdoor applications or ozone exposure, use EPDM instead. For extreme chemicals, consider Viton® (FKM).

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