Nitrile (NBR)
The pick for oils, greases and fuels: engine gaskets, pumps and hydraulic equipment, 60 durometer.
The moment a gasket touches oil, grease or fuel, nitrile is the rubber you want. NBR — also sold as Buna-N — is the standard elastomer of machinery: sump gaskets, pump seals, hydraulic reservoir covers. Where EPDM or SBR would swell and fall apart within weeks, nitrile keeps sealing for years.
- Thicknesses2 thicknesses, from 1/16 in to 1/8 in
- ProcessCO₂ laser cutting
- Max. size44 × 30 in per part, from one part
Laseo cuts your NBR gaskets on a CO₂ laser straight from your drawing — handy for replacing the gasket of a pump whose manufacturer no longer exists, or producing ten identical seals without paying for a die. Available in 1/16 and 1/8 in., 60 Shore A durometer.
Key properties
Petroleum resistance: motor and hydraulic oils, greases, diesel, gasoline, kerosene — nitrile’s specialty.
Temperature range: -20°F to +190°F (-29°C to +88°C), covering the vast majority of machinery applications.
Good mechanical strength: solid abrasion and compression behaviour, it handles repeated flange torquing well.
Hardness: 60 Shore A, the standard for cut gaskets — firm under the bolt, compliant on imperfect surfaces.
Its limits: sunlight and ozone crack it over time — for permanent outdoor exposure choose EPDM or neoprene. It also dislikes ketones and chlorinated solvents.
Common applications
Sump, valve cover and flange gaskets on engines and transmissions.
Pump, compressor, hydraulic and pneumatic system seals.
Fuel tank gaskets and farm or forestry equipment seals.
Wear pads and strips anywhere oil is unavoidable in the shop.
Design tips
Target 20-30% compression for a full-face gasket. Pick 1/8 in. if your flange surfaces are worn or scratched.
Leave at least 0.035 in. between a bolt hole and the gasket edge.
Send the original gasket drawing (DXF or dimensioned sketch) and get an identical part back — from a single part.
Get this material cut to your specs
Upload your drawing or use the sketch generator: pick the material, thickness and operations, and get your price on the spot.
Thicknesses and specifications — Nitrile (NBR)
Overview of available thicknesses and manufacturing capabilities for this material. The tabs above give full details per thickness.
View the thicknesses and tolerances table
| Thickness | Gauge | Cutting tolerance | Process |
|---|---|---|---|
| 0.063" | 1/16" | — | CO₂ laser |
| 0.125" | 1/8" | — | CO₂ laser |