Excellent Heat Resistance: HNBR O-rings can operate continuously at temperatures up to 150°C (302°F), with some formulations able to withstand intermittent exposure up to 160-170°C. Peroxide-cured HNBR can endure 1000+ hours at 160°C in air, a condition where NBR would completely fail
Superior Oil & Fuel Resistance: HNBR offers exceptional resistance to petroleum-based oils, fuels, and other hydrocarbon fluids. It has 5 times better resistance to sour gasoline than standard NBR. The level of resistance is directly related to the Acrylonitrile (ACN) content.
Excellent Mechanical Strength: HNBR exhibits high tensile strength, tear resistance, abrasion resistance, and outstanding resistance to compression set, which is critical for long-term sealing force
Broad Chemical Compatibility: HNBR performs well with aliphatic hydrocarbons, vegetable oils, silicone oils, HFA/HFB/HFC hydraulic fluids, dilute acids and bases, and steam up to 149°C
Good Low-Temperature Flexibility: HNBR remains flexible down to approximately -40°C (-40°F). Special low-temperature grades can perform as low as -55°C (-67°F)
Ozone, Aging & Weather Resistance: The hydrogenation process provides outstanding resistance to ozone cracking, aging, and weathering, making it far superior to standard NBR in this regard
Applications
Engine Systems: Valve stem seals, crankshaft seals, camshaft seals, O-rings for oil and fuel systems.
Fuel Systems: Fuel injector seals, fuel pump seals, especially for bio-fuels and sour gasoline.
Transmission & Drivetrain: Automatic transmission fluid (ATF) seals, O-rings for clutches, and components in hybrid vehicle transmissions.
Air Conditioning: Seals for AC compressors compatible with R134a and newer refrigerants like R1234yf.
