O-Ring Material Reference Guide

Popular materials with very basic and generalized recommended and non-recommended uses with typical mechanical properties. Specific material compound formulations can significantly alter the general performance properties. Please contact an application engineer for assistance in selecting the compound that provides the best combination of performance and price for your specific application.

Material Recommended Use Not Recommended For Mechanical Properties
Buna-N  (Nitrile)

Standard: 70 Durometer Black
Temperature Range: -35ºF to 250ºF

Least Expensive / Readily Available
Silicone Greases / Oils
Water
Petroleum Oils / Fuels
Ethylene Glycol Fluids
Ketones (MEK)
Halogenated Hydrocarbons
Auto / Aircraft Brake Fluids
Strong Acids
Sunlight, Ozone,  Weathering
Good Wear Resistance
Good Compression Set Resistance
Good Short-Term Resilience
Good Permeation Resistance
Viton® (Fluorocarbon Type A)

Standard: 75 Durometer Black
Temperature Range: -15ºF to 400ºF

Vacuum
Most Acids / Chemicals
Halogenated Hydrocarbons
Di-Ester Lubricants
Petroleum Oils / Fuels
Silicone Oils / Greases
Ketones (MEK)
Auto / Aircraft Brake Fluids
Amines (Ammonia)
Acetone, Skydrol, Ethyl Acetate
Hot Water and Steam (except specialty grades)
Low Molecular Esters and Ethers
Good Wear Resistance
Excellent Comp. Set Resistance
Moderate Short-Term Resilience
Excellent Permeation Resistance
Silicone

Standard: 70 Durometer Orange
Temperature Range: -65ºF to 450ºF

Dry Heat
Wide Temperature Range
Sunlight, Ozone,  Weathering
Odorless and Non-Toxic
Ketones (MEK)
Acids
Silicone Oils
Brake Fluids
Poor Wear Resistance
Excellent Comp. Set Resistance
Poor Short-Term Resilience
Excellent Permeation Resistance
EPDM  (Ethylene Propylene)

Standard: 70 Durometer Black
Temperature Range: -60ºF to 250ºF

Sunlight, Ozone,  Weathering
Hot Water and Steam
Auto / Aircraft Brake Fluids
Some Acids and Bases
Ketones and Alcohols
Plumbing
Petroleum Oils
Fuels
Good Wear Resistance
Good Comp. Set Resistance
Moderate Short-Term Resilience
Good Permeation Resistance
Material Recommended Use Not Recommended For Mechanical Properties

Chemraz® / Kalrez® / Simriz® (Perfluoroelastomer)

Various Compounds
Designed for Specific Applications
Temperature Range: -10ºF to 615ºF

High Temperature Resistance
Excellent Chemical Resistance
Low Out Gassing
Chlorine Wet/Dry
Petroleum Oil
Chlorinated Hydrocarbons
Molten metals
Gaseous Alkali Metals
Halogenated Freons/Fluids
Uranium Hexafluoride
Good Wear Resistance
Good Comp. Set Resistance
Moderate Short-Term Resilience
Good Permeation Resistance
Neoprene® (Chloroprene)

Standard: 70 Durometer Black
Temperature Range: -35ºF to 250ºF

Refrigerants (Freon)
Ammonia
Some Petroleum Oils
Dilute Acids
Silicone ester Lubricants
Ketones (MEK)
Gasoline
Auto / Aircraft Brake Fluids
Good Wear Resistance
Moderate Comp. Set Resistance
Moderate Short-Term Resilience
Good Permeation Resistance
Urethane

Standard: 90 Durometer Translucent
Temperature Range: -65ºF to 200ºF

Drive Belts
Some Petroleum Oils
Some Hydrocarbon Fuels
Oxygen / Ozone
Ketones (MEK)
Acids
Auto / Aircraft Brake Fluids
Chlorinated Hydrocarbons
Water
Excellent Wear Resistance
Poor Comp. Set Resistance
Excellent Short-Term Resilience
Fluorosilicone

Standard: 70 Durometer Blue
Temperature Range: -80ºF to 450ºF

Jet Fuel
Dry Heat
Wide Temperature Range
Some Petroleum Oils
Chlorinated Solvents
Ketones (MEK)
Phosphate Esters
Some Acids
Auto / Aircraft Brake Fluids
Amines (Ammonia)
Poor Wear Resistance
Moderate Comp. Set Resistance
Moderate Short-Term Resilience
Poor Permeation Resistance
Teflon® Encapsulated

O-Ring Covered with Teflon Tube
Usually Silicone or Viton®

Depends on O-Ring Core
Chemical Resistance
Heat Resistance
Depends on O-Ring Core Good Wear Resistance
Good  Short-Term Resilience
Good Permeation Resistance
Teflon®

Standard: Non-Elastic White
Temperature Range: -250ºF to 450ºF

Chemical Resistance
Fuel Resistance
Low Coefficient of Friction
Non-Elastic
Good Wear Resistance
Low Coefficient of Friction
Material Recommended Use Not Recommended For Mechanical Properties

Don't see what you need?  Please contact an application engineer for assistance in selecting the compound that provides the best combination of performance and price for your specific application.    

Selecting an O-Ring material for a specific application depends on many important criteria including:
Service Conditions (media to be sealed, temperature range, pressure/vacuum range, dynamic motion)
Design Attributes (component geometry, desired service life, installation considerations, tolerances)

This guide is intended for general reference use only.
The materials and compound numbers listed are the most commonly used.
There are numerous compound variations designed for specific applications.
For demanding applications, please provide all the details to our application engineers for a recommendation.

Call 800-775-6525