EPDM O-Rings

EPDM O-Ring Material Description

Ethylene Propylene Rubber (EPR) is a Copolymer of ethylene and propylene. Furthermore, EPDM is a terpolymer of ethylene and propylene with a small amount of a third monomer (usually a diene) to permit vulcanization with sulfur. EPDM o-rings are useful for a number of industries from automobile assembly to water purification systems.

Generally, EPDM o-rings are known to possess excellent resistance to ozone, sunlight, and weathering and have very good flexibility at low temperatures, good chemical resistance (many dilute acids and alkalis as well as polar solvents), and good electrical insulation properties. EPDM o-rings may also come in a metal detectable variation while retaining the same qualities as the general EPDM o-ring compound. EPDM o-rings are typically back in color, with a long-lasting shelf life.

Cure System: Peroxide-Cured

Standard EPDM o-ring compounds are usually sulfur-cured. Sulfur-cured compounds offer better flexible properties but are more prone to hardening and have an inferior compression set in high temperatures.

Peroxoide-cured EPDM o-ring compounds have better heat resistance and a lower compression set. They are suitable for long-term usage, especially for hose systems in the construction industry, but they are more expensive and difficult to produce than sulfur-cured EPDM o-ring compounds. For more information on EPDM cure systems, click here.

EPDM O-Ring Compounds

Compounds	Durometer	Color	Temp Range (F)	Data Sheet	Description
E70101	70	Black	-67 to +257		General purpose
E70116	70	Black	-67 to +302		NSF 61
E70118	70	Black	-67 to +257		FDA Compliant, NSF 61
E70771	70	White	-67 to +257		USP Class VI Certified, ISO 10993-5 Compliant, Internally Lubed
E75YL12	75	Yellow	-67 to +257		Metal/X-ray detectable, FDA-Grade
E801401	80	Purple	-40 to +212		General purpose
E90192	90	Black	-22 to +302		R744 Refrigerant Compatible