Home / Materials & Finishes / NBR (Buna-N)

NBR (Buna-N)

The standard rubber choice wherever a seal has to hold up against oil or fuel.

Example: molded NBR (Buna-N)

What is it?

An oil- and fuel-resistant rubber, the standard choice wherever petroleum-based fluids are present.

Key behavior

Outstanding resistance to petroleum oils, fuels, and hydraulic fluids.

Why choose it

Any seal or gasket that will contact oil, fuel, or hydraulic fluid.

Applications

O-rings, automotive fuel seals, oil gaskets, hydraulic packings.

Molding notes

The default rubber choice specifically for fuel/oil contact applications.

Properties

Density0.98-1.0 g/cm3
Typical HardnessShore 40A-90A
Typical StrengthStrong oil/fuel resistance
Lead TimeConfirmed per RFQ
FinishingConfirmed per RFQ
Request a Quote

Send us a drawing. Get a real engineer's answer.

Upload your CAD file, materials, and target quantity — we'll come back with a manufacturability review and a quote. Our engineers review every request personally.