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Cage Code: 72PR0 | (208) 413-6377 8am-3pm Pacific Monday-Friday

Urethane O-Rings 90 Duro

Polyurethane - Polyurethane - Duro 90 (Hard) - Milky White

Polyurethane rubber is notable for its combination of hardness with elasticity, outstanding abrasion resistance and tear strength. Elastomeric urethane rubber, not to be confused with thermoplastic polyurethane, may be either ether (EU) or ester (AU) base, with the latter being the far more common of the two. It is often referred to as the "millable gum" urethane. The ester based polymer is superior in resistance to abrasion and heat, while the ether based polymer has better flexibility at low temperatures. Polyurethane is a moderately expensive material whose use is usually limited to applications that require its outstanding physical properties. Common end use applications are industrial seals, industrial rolls, O-Rings, caster wheels, gaskets, shoe soles and conveyor belts. Peroxide is the most commonly employed cure system, but sulfur curing is also possible in the extremely complex vulcanization chemistry involved in polyurethanes.

GENERAL TEMPERATURE RANGE: -25° to +300° F

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The O-ring Store offers great deals on a large selection of AS568 Buna-N O-rings (Nitrile), Metric Buna-N O-rings (Nitrile), Standard O-rings, Metric O-rings, Viton O-rings, Viton Extreme O-rings, in many compounds and colors. We are the best source for common and not so common o-rings. Buy o-rings online, fax 208-413-3719 or call 208-413-6377. The O-ring Store can save you hundreds of dollars and deliver quicker than most o-ring suppliers world wide! Plus convenient, flat fee shipping from FedEx and the US Postal Service.


Welcome to The O-ring Store, were you can find a huge selection of o-rings, hydraulic seals, o-ring kits and accessories. We have factory and custom made repair kits to provide you with o-rings and seals to fix everything from paintball guns, pools, sprayers, air tools to large hydraulic cylinders. In addition to our inventory we use many factories, suppliers, and even competitors to get what you need, when you need it, were you need it, at an agreed upon price with no surprises. We compete with O-rings West, Marco Rubber, O-rings USA, Apple Rubber, Parker, MSC Industrial Supply, North Coast Seal, Orings and More, and many more that make us better. We make getting your O-rings easy!

We are continuing to expanding our selection of Hydraulic Seals, Oil Seals, O-ring Kits, rebuild kits and O-rings.