We are your source for all of your O-Ring needs. We stock all rubber compounds and sizes to meet all of your requirements, from ASTM to Military, including FDA per CFR 177.2600 . We stock millions of parts in hundreds of sizes.

Below our the 4 primary polymers we keep in stock. Call for other exotic requirements.

Our NSF-61 listed compounds are certified by NSF to meet the ANSI/NSF61 guidelines. See our NSF listing at www.nsf.org. Call for low NSF pricing !

NITRILE is also referred to as Buna-N.  Nitrile has good mechanical properties when compared with other elastomers and high wear resistance. Nitrile is not resistant to weathering and ozone. 

EPDM offers excellent ozone, weather and abrasion resistance, as well as low temperature capabilities. We stock sulfur and peroxide-cured, from low compression set to FDA. EPDM is not compatible with oils and fuels.

SILICONE offers the broadest temperature range, from (-75F to +450F). It has excellent compression set, ozone resistance, and great immersion properties. As a group, the silicones have low tensile strength and poor tear & wear resistance.  Silicone is not compatible with gasoline.

VITON® has the best combination of chemical compatibility, high temperature range, and excellent compression set resistance.  We use only Dupont's Viton® to guarantee complete compliance with the toughest ASTM and military specifications. Viton® is not compatible with glycol base brake fluids, ammonia gas, and alkalis. Viton® is a trademark of Dow.

For more information about our product lines,
please contact us at:

23272 Arroyo Vista
Rancho Santa Margarita, CA 92688
Tel. 800-913-9582
Fax 800-913-9583
Email: sales@rpmproducts.com