Differences Between Viton & EPDM

By Matthew Munoz ; Updated April 12, 2017

Viton and EPDM are both common elastomers used for O-rings. Elastomers are a type of rubber polymer with high yield strength. Yield strength refers to the point at which your material won’t return to its original shape after being stressed. Basically, they can be stretched a great deal without breaking. The most common usage for such elastomers are as a gasket material. Pumps, valves and other related equipment use such elastomers to prevent leakage.

Viton

Viton is a fluoroelastomer manufactured by DuPont. It has a temperature range of -15 to 400 degrees Fahrenheit. It is very resistant to damage caused by compression, heat, acids, alkalis, petrol-based substances, sunlight, salt solution and ozone. It has poor resistance to acetones and ketones.

EPDM

EPDM is ethylene-propylene-diene-monomer. It has a temperature range of -70 to 300 degrees Fahrenheit. It is very resistant to damage caused by compression, heat, sunlight, alkalis and ozone. It has a poor resistance to petrol-based substances, acids and hydrocarbons.

Usage

The basic difference is range. Viton can handle higher temperatures, whereas EPDM can handle lower temperatures. Viton is also more resistant to chemicals and oils, but if you are to have acetones present, you will want to choose EPDM.

About the Author

Matthew Munoz began writing in 2010. He writes for eHow and other online publications, specializing in fishing, cooking, mechanical HVAC engineering, automotive and marine engines. Munoz received a Bachelor of Engineering in naval architecture from SUNY Maritime College.