XNBR (Carboxylated Nitrile) Selection Guide
XNBR O-rings, gaskets, & custom molded parts are similar to Nitrile, but the backbone has been chemically modified with a Carboxylic Acid group. The resulting elastomer is a Nitrile rubber with outstanding abrasion and chemical resistance, superior to that of traditional Nitrile. This makes XNBR O-rings, gaskets, & custom molded parts well suited for a wide variety of applications, including many dynamic applications. The added strength and abrasion resistance of XNBR make these seals, O-rings, gaskets, & custom molded parts popular for reciprocating parts in heavy industrial applications.
Carboxylated Nitrile O-rings, gaskets, & custom molded parts are great for many static applications as well, check with one of Canyon’s helpful product engineers for an expert seal recommendation.
Common names include: XNBR (Carboxylated Nitrile) Trade Names: Nipol®, Krynac®, Paracril®
XNBR O-rings from Canyon Components deliver improved abrasion and tear resistance for sealing in hydraulic systems, automotive components, and industrial equipment.
XNBR (Carboxylated Nitrile) Materials Available
This table shows many of our standard materials and links out to our O-ring store. Get in touch with us if you need a custom gasket, custom molded part, or non-standard geometry!
Filter by
Temperature Search (°C)
Features of XNBR
- XNBR O-rings, gaskets, & custom molded parts have excellent resistance to compression set, abrasion, and tearing
- XNBR O-rings, gaskets, & custom molded parts have excellent resistance to oils, fuels, aliphatic hydrocarbons
- XNBR O-rings, gaskets, & custom molded parts have good resistance to many diluted acids and bases
- XNBR O-rings, gaskets, & custom molded parts have an extended temperature range compared to traditional Nitrile
- XNBR O-rings, gaskets, & custom molded parts have resistance to refrigerants: R-11, R-12, R-13
- XNBR O-rings, gaskets, & custom molded parts are available in multiple compounds to meet performance and cost requirements
Limitations of XNBR
- XNBR O-rings, gaskets, & custom molded parts have poor resistance to ozone, direct sunlight, UV, and weathering
- XNBR O-rings, gaskets, & custom molded parts have poor resistance to aromatic fuels, glycol-based brake fluids, polar solvents, non-flammable hydraulic fluids (HFD), aromatic/chlorinated hydrocarbons, ketones, esters, and aldehydes
- XNBR O-rings, gaskets, & custom molded parts have a Service Temperature Range of (varies with application): -20°F to 302°F ( -30°C to 150°C)
Please consult a Canyon Components Engineer about your specific application and we will use our decades of experience to formulate a solution that fits your need.
Back to Elastomers Hub
