Buna-N (Nitrile, NBR) is the specialist for oil, fuel, and hydraulic service. No common elastomer resists petroleum products better, which makes it the standard for automotive, fuel-system, and hydraulic gaskets. We laser-cut custom Buna-N gaskets to your exact dimensions with no minimum order and ship within 24 hours. Custom Buna-N Gasket Specifications Temperature range −40°F to 250°F Durometer (hardness) 60–70 Shore A standard Excellent resistance to Petroleum oils, fuels, hydraulic fluids, and greases Poor resistance to Ozone, UV, weathering, and sunlight (not for outdoor use) Thicknesses available 1/16", 1/8", 3/16", 1/4" Additional specifications and specific durometers are available on request — contact us with your requirements. Common Buna-N Gasket Applications Fuel-system and carburetor gaskets Hydraulic and pneumatic seals Automotive engine and oil-pan gaskets Pump and compressor seals Oil and grease reservoir covers Industrial machinery gaskets When to Choose Buna-N Choose Buna-N whenever the gasket will contact oil, fuel, or hydraulic fluid — it outperforms every other standard material there. Do not use it outdoors or in sunlight, where its poor ozone resistance causes cracking; choose EPDM or Neoprene for weather exposure instead. Buna-N Gasket FAQs What is Buna-N gasket material?Buna-N — also called Nitrile or NBR — is a synthetic rubber prized for excellent resistance to petroleum oils, fuels, and hydraulic fluids. It is the standard for automotive and fluid-system gaskets.Can Buna-N be used outdoors?No. Buna-N has poor resistance to ozone, UV, and weathering and will crack in prolonged sunlight. For outdoor sealing, choose EPDM or Neoprene.Is Buna-N good for fuel?Yes — Buna-N is one of the best materials for gasoline, diesel, and oil contact, which is why it is used throughout fuel and hydraulic systems. Enter your dimensions in the quote tool above for an instant price on custom Buna-N gaskets from Fastest Gaskets — no minimum order, ships in 24 hours. {"@context":"https://schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"What is Buna-N gasket material?","acceptedAnswer":{"@type":"Answer","text":"Buna-N — also called Nitrile or NBR — is a synthetic rubber prized for excellent resistance to petroleum oils, fuels, and hydraulic fluids. It is the standard for automotive and fluid-system gaskets."}},{"@type":"Question","name":"Can Buna-N be used outdoors?","acceptedAnswer":{"@type":"Answer","text":"No. Buna-N has poor resistance to ozone, UV, and weathering and will crack in prolonged sunlight. For outdoor sealing, choose EPDM or Neoprene."}},{"@type":"Question","name":"Is Buna-N good for fuel?","acceptedAnswer":{"@type":"Answer","text":"Yes — Buna-N is one of the best materials for gasoline, diesel, and oil contact, which is why it is used throughout fuel and hydraulic systems."}}]}
