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Carboxylated Nitrile (XNBR)

Carboxylated Nitrile (XNBR) is a special type of nitrile polymer that exhibits enhanced tear and abrasion resistance. For this reason, XNBR based materials are often specified for dynamic applications such as rod seals and rod wipers.


Heat resistance

• Up to 100°C (212°F) with shorter life @ 121°C (250°F).


Cold flexibility

• Depending on individual compound, between -18°C and -48°C (0°F and -55°F).


Chemical resistance

• Aliphatic hydrocarbons (propane, butane, petroleum oil, mineral oil and grease, diesel fuel, fuel oils) vegetable and  mineral oils and greases.

• HFA, HFB and HFC hydraulic fluids.

• Many diluted acids, alkali and salt solutions at low temperatures.


Not compatible with:

• Fuels of high aromatic content (for flex fuels a special compound must be used).

• Aromatic hydrocarbons (benzene).

• Chlorinated hydrocarbons (trichloroethylene).

• Polar solvents (ketone, acetone, acetic acid, ethylene-ester).

• Strong acids.

• Brake fluid with glycol base.

• Ozone, weather and atmospheric aging.

Parker Hannifin
O-Ring & Engineered Seals
2360 Palumbo Drive
Lexington, KY 40509
Ph: 859-269-2351
Fax: 859-335-5128