The most common O-ring material for vacuum applications is FKM Viton® A or a similar fluoroelastomer. Please note that not all of the O-ring materials listed 

Our most popular O Ring Material is Nitrile (NBR) 70° Shore 'A'. This is an Elastomer seal that can do the majority of standard industrial applications.

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O-Ring Materials: Strengths, Limitations, and Applications · Buna-N/Nitrile · Aflas® · Butyl · Ethylene Propylene · Fluorocarbon (Viton®).

There are a number of popular high-temperature o-ring material choices, including nitrile, hydrogenated nitrile, silicone rubber, polyacrylate and more.

Buna-N (Nitrile) is the most common type of material used in quick-acting couplings. It provides a great seal and is commonly used in crude oil, gasoline, propane, petroleum oils and water. This type of O-ring performs best in temperatures ranking from 40 to 250-degrees Fahrenheit. Peroxide-cured Ethylene Propylene Diene Rubber (EPDM)

Nitrile (Buna-N) is a general purpose material suited for petroleum oils, water, and some hydraulic fluids. · Ethylene Propylene Rubber (EPR) 

Compare O-Ring Material Use Compatibility Differences ; Neoprene®. (Chloroprene), Standard: -35°F to 250°F · Specialty: -67°F to 250°F · Neoprene O-Ring Prices 

Popular Sealing Material Families. We're proud to offer the world's largest inventory of readily-available and highly customized sealing solutions. Explore some of the most common sealing materials we offer here. Markez® O-Rings FFKM. Fluorosilicone O-Rings FVMQ. Polyurethane O-Rings. Kalrez® O-Rings FFKM. EPDM O-Rings. Chemraz® O-Rings FFKM.

Different O-ring materials are capable of being used with certain liquids and gases since some can withstand the effects of chemicals and oil, while others are not designed for such conditions. During the design phase, it is important to consider, and closely examine, the types of gases or liquids the O-ring may be subjected to.

O-rings can be formed from a broad selection of materials to suit different environments and applications. Some of the most commonly used materials are: Fluorosilicone. This material can withstand exposure to chemicals, ozone, petroleum, and soap, which is why it is often used in applications where exposure to fuel and oil is likely.