Introduction
If you work with machinery, cars, or electronics, you’ve probably run across an NBR gasket. Also called a nitrile rubber gasket, this sealing part is built from Buna-N nitrile rubber, a synthetic rubber made with butadiene and a chemical called acrylonitrile.
What makes it so common? Simple — it handles oils, fuels, and greases better than most materials, while still offering abrasion resistance and solid strength. That’s why industries continue to trust it, even when newer rubbers hit the market.
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What is an NBR Gasket?
An NBR gasket is a sealing ring or sheet cut from Buna-N nitrile rubber sheet or from nitrile rubber strips. The material’s resistance properties make it a dependable choice wherever leaks would be a disaster.
Key Properties of NBR Rubber Gaskets
- Resistance to oils and fuels – A big advantage in engines, pumps, and hydraulic systems.
- Abrasion resistance – Keeps its shape even in moving or vibrating equipment.
- Tensile strength and compression set – Resists permanent deformation under pressure.
- Temperature range – Performs reliably between –40°C (–40°F) and +120°C (+248°F).
Where You’ll Find NBR Rubber Gaskets
Automotive
From fuel pumps to transmissions, NBR rubber gaskets block leaks and hold up against fuels, oils, and greases. We provide Rubber Parts for Automotive that are built to handle heat and constant vibration.
Hydraulic and Pneumatic Systems
In cylinders, pumps, and valves, NBR gaskets help contain high-pressure fluids. For standard material requirements, check SAE International: Rubber Standards.
Electronics and Electrical Gear
Manufacturers often cut Buna-N nitrile rubber sheets or nitrile rubber strips into precision gaskets. These protect sensitive housings, cushion connectors, and cut down on vibration. Curious? Explore our Rubber Parts in Electronics.
General Industry
Compressors, pumps, and heavy machinery all rely on synthetic rubber gaskets for dependable sealing when exposed to oils.
NBR vs. Other Gasket Materials
- Natural rubber – Flexible, but weak against oils and fuels.
- Silicone rubber – Works in extreme hot and cold but doesn’t hold up to abrasion or petroleum oils.
- High-performance rubbers – Options like Viton® give excellent oil resistance, even at higher temperatures, but come at a higher cost.
For most standard sealing jobs, NBR rubber gaskets win on balance: strong performance at a reasonable price.
Material Formats Available
- Buna-N nitrile rubber sheet – Easy to cut into custom gaskets.
- Nitrile rubber strips – Perfect for long runs, insulation, or repetitive gasket cutting.
- Commercial grade molded gaskets – Used in precision-built parts for automotive and electronics.
For more formal material specs, see ASTM International: Rubber Standards.
Conclusion
NBR gaskets have earned their place as a go-to sealing material. They deliver excellent oil resistance, strong abrasion resistance, and high tensile strength while staying cost-effective. That’s why they remain essential in automotive, hydraulic, electronic, and industrial systems.
Need seals that stand up to fuels, oils, and greases? Our team builds custom gaskets from Buna-N nitrile rubber sheets and nitrile rubber strips to meet your needs.
Contact Us
Have a project that needs durable sealing solutions? Get in touch with us today.