// Material · NBR

NBR (Nitrile).

NBR — nitrile — is the industrial workhorse for oil, fuel and hydraulic sealing, with strong abrasion resistance. We mould and extrude it into O-rings, seals and gaskets for fluid-power and automotive systems.

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Key properties

Typical ranges
Temperature range−40°C to +120°C
Hardness40–95 Shore A
Oil / fuel resistanceExcellent
Abrasion resistanceExcellent
UV / ozone / outdoorPoor — use EPDM / Neoprene

Indicative ranges; the exact grade and hardness are matched to your application.

// Why NBR

The fluid-power workhorse.

Oil & fuel

Excellent resistance to mineral oils, fuels and hydraulic fluids.

Abrasion

Tough wearing for dynamic and high-contact seals.

Value

Strong all-round sealing at sensible cost.

Versatile hardness

Available across a wide durometer range.

// Forms we make

Moulded and extruded.

Moulded

O-rings, oil seals and gaskets to drawing.

Extruded

Profiles and cords for oil-side sealing.

// Best for

Where it fits.

Automotive

Oil seals, fuel-system and ancillary gaskets.

Hydraulics & pneumatics

Fluid-power O-rings and seals.

Industrial OEMs

Oil-resistant gaskets to spec.

// Honest limits

Where we'd point you elsewhere.

UV, ozone & outdoors

NBR ages poorly in sun and ozone — for outdoor use we recommend EPDM or neoprene.

// FAQ

Common questions.

Why is nitrile used for oil seals?

NBR resists mineral oils, fuels and hydraulic fluids very well, which makes it the default for oil seals and fluid-power O-rings.

Is NBR good outdoors?

No — nitrile ages poorly under UV and ozone. For outdoor sealing we recommend EPDM or neoprene.

What temperature range does NBR handle?

Typically about −40°C to +120°C, depending on grade.

Need an NBR part?

Send a drawing, sample or spec — we'll recommend the material and come back to you.

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Explore our materials — Silicone, EPDM, FKM, NBR, Neoprene and SBR →