Material

Recomended Use

Not Recomended 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

Keytones (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

Keytones (MEK)
Auto / Aircraft Brake Fluids
Amines (Ammonia)
Acetone, Skydrol, Ethyl Accetate
Hot Water and Steam
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

Keytones (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 ans Bases
Keytones ans Alcohols
Plumbing

Petroleum Oils
Fuels

Good Wear Resistance
Good Comp. Set Resistance
Moderate Short-Term Resilience
Good Permeation Resistance

Material

Recomended Use

Not Recomended 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 Petrolium Oils
Dilute Acids
Silicone ester Lubricants

Keytones (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

Keytones (MEK)
Acids
Auto / Aircraft Brake Fluids
Chlorinated Hydrocarbons
Water

Excelent Wear Resistance
Poor Comp. Set Resistance
Excelent Short-Term Resilience

Fluorosilicone

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

Jet Fuel
Dry Heat
Wide Temperature Range
Some Petroleum Oils
Clorinated Solvents

Keytones (MEK)
Phosphate Esters
Some Acids
Auto / Aircraft Brake Fluids
Amines (Ammonia)

Poor Wear Resistance
ModerateComp. 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