Available products: O-rings, Vulcanised joined cord rings, Washers, Gaskets, Sheet, Strip, Mouldings, Extrusion, O-ring cords

Carboxylated Nitrile (XNBR) is Nitrile with a carboxyl group added to the formulation. This addition results in improved tear and abrasion resistance, but at the cost of higher compression set. XNBR is often specified for dynamic applications. However, for new applications Hydrogenated Nitrile is preferred over XNBR. The normal service temperature range is -20°C to +125°C.

May be used for Should not be used for

Ethylene Glycol

Silicone Fluids

Petroleum Fluids

Water (to 100°C)

Brake fluids


Ozone or weathering

Phosphate esters

Strong acids

Carboxylated Nitrile is available as a special order for O-rings, O-ring cord, washer, gasket and strip products.