O-Ring Material Chart - Quick Selection Guide

Compare O-Ring Material Use Compatibility Differences

O-ring material family chemical compatibility, temperature resistance, and other properties all factor in to o-ring material selection for an application. This popular o-ring material family comparison shows basic rubber material family properties and performance plastic properties. The guide includes generalized recommended o-ring mateiral uses and non-recommended uses with typical material mechanical properties. Specific material compound formulations can significantly alter the general performance properties.

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Click a material family row for details and compounds

Material

Temperature Range

Relative Price

Recommended Uses

Not Recommended For

Common Industry Applications:

Mechanical Properties

FFKM

(Perfluoroelastomer, Markez®, Chemraz® / Kalrez® / Simriz®) Standard: 5°F to 550°F
Specialty: -50°F to 650°F High Cost of Maintenence or Downtime
High Temperature Resistance
O-ring Chemical Resistance
Low Out Gassing
Chlorine Wet/Dry
Petroleum Oil
Chlorinated Hydrocarbons Molten metals
Gaseous Alkali Metals
Halogenated Freons/Fluids
Uranium Hexafluoride
Oil and Gas Explosive Decompression Resistant O-rings (Norsok O-rings, NACE O-rings)
Life Science Industry Seals
Medical O-rings and Pharma Industry Seals (USP Class VI O-rings, ISO O-rings)
Food and Beverage Manufacturing O-rings (Food & Drug Administration O-rings)
Semicon O-rings (SEM O-rings, Ultra High Purity Seals, Low Outgassing Seals, Low Particulate O-rings) Good Wear Resistance
Good Compression Set Resistance
Moderate Short-Term Resilience
Good Permeation Resistance

Buna-N

(Nitrile) Order O-rings Online Standard: -35°F to 250°F
Specialty: -70°F to 275°F Silicone Greases / Oils
Water
Petroleum Oils / Fuels
Ethylene Glycol Fluids Ketones (MEK)
Halogenated Hydrocarbons
Auto / Aircraft Brake Fluids
Strong Acids
Sunlight, Ozone,  Weathering Oil and Gas Seals
Explosive Decompression Resistant O-rings (Norsok M-710 Seals, NACE TM Seals)
Automotive Fuel and Oil Seals
Military Applications (MIL Spec Compliant Seals) Good Wear Resistance
Good Compression Set Resistance
Good Short-Term Resilience
Good Permeation Resistance

Viton®

(Fluorocarbon Type A) Order O-rings Online Standard: -15°F to 437°F
Specialty: -54°F to 437°F 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 Chemical Processing Industry Seals (CPI Seals)
Aerospace Seals (SAE, AMS, MIL Compliant Seals)
Explosive Decompression (RGD) Resistant Oil and Gas Industry Seals (Norsok M-710 O-rings, NACE TM O-rings)
Automotive Fuel O-rings and Oil Seals Good Wear Resistance
Excellent Compression Set Resistance
Moderate Short-Term Resilience
Excellent Permeation Resistance

Silicone

Order O-rings Online Standard: -65°F to 400°F
Specialty: -100°F to 500°F Dry Heat
Wide Temperature Range
Sunlight, Ozone,  Weathering
Odorless and Non-Toxic Ketones (MEK)
Acids
Silicone Oils
Brake Fluids Life Science Industry Seals
Drug and Pharma Industry Seals (USP Class VI O-rings, ISO O-rings)
Medical Tubing and Seals (USP Class VI Tubing, ISO Tubing)
Food and Beverage Contact Seals (FDA O-rings, NSF-51 O-rings, 3-A Sanitary O-rings)
Drinking Water Seals (NSF-61 O-rings, WRAS O-rings, KTW O-rings)
Semiconductor Equipment Seals and Wafer Manufacturing (Ultra High Purity O-rings, Low Outgassing O-rings) Poor Wear Resistance
Excellent Compression Set Resistance
Poor Short-Term Resilience
Excellent Permeation Resistance

EPDM

(Ethylene Propylene) Standard: -65°F to 300°F
Specialty: -65°F to 300°F Sunlight, Ozone,  Weathering
Hot Water and Steam
Auto / Aircraft Brake Fluids
Some Acids and Bases
Ketones and Alcohols
Plumbing Petroleum Oils
Fuels Life Science Industry O-rings
Pharma and Medical Grade O-rings (USP Class VI Seals, ISO Seals)
Food Grade O-rings (FDA Rubber Sheet, NSF-51 Seals, 3-A Sanitary Rubber)
Drinking Water O-rings (NSF-61 Compliant Gaskets, WRAS Compliant Gaskets, KTW Compliant Gaskets) Good Wear Resistance
Good Compression Set Resistance
Moderate Short-Term Resilience
Good Permeation Resistance

Material

Temperature Range

Relative Price

Recommended Uses

Not Recommended For

Common Industry Applications:

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Mechanical Properties

Aflas®

(TFE/P)

Standard: 32°F to 450°F
Specialty: -15°F to 450°F Vacuum
Most Acids / Solvents
Halogenated Hydrocarbons
Di-Ester Lubricants
Petroleum Oils / Fuels
Amines (Ammonia)
Bases
Steam Ketones (MEK)
Auto / Aircraft Brake Fluids
Acetone, Skydrol, Ethyl Acetate
Low Molecular Esters and Ethers Chemical Processing Industry O-rings (CPI O-rings)
Oil and Gas Drilling O-rings (ED Resistant O-rings, Norsok M-710 Seals, NACE TM Seals)
Automotive O-rings and Oil Seals Good Wear Resistance
Moderate Compression Set Resistance
Moderate Short-Term Resilience
Excellent Permeation Resistance

Neoprene®

(Chloroprene) Standard: -35°F to 250°F
Specialty: -67°F to 250°F Refrigerants (Freon)
Ammonia
Some Petroleum Oils
Dilute Acids
Silicone ester Lubricants Ketones (MEK)
Gasoline
Auto / Aircraft Brake Fluids Refrigerant System Seals (Freon O-ring Compatibility, R22 Refrigerant, R134 Refrigerant, R410A Refrigerant, Ammonia O-rings)
Good Wear Resistance
Moderate Compression Set Resistance
Moderate Short-Term Resilience
Good Permeation Resistance

Polyurethane

Standard: -30°F to 180°F
Specialty: -65°F to 250°F Drive Belts
Some Petroleum Oils
Some Hydrocarbon Fuels
Oxygen / Ozone Ketones (MEK)
Acids
Auto / Aircraft Brake Fluids
Chlorinated Hydrocarbons
Water Mechanical Seals and Assemblies
Fluid Transfer System Seals
Hydraulic System Seals and Assemblies Excellent Wear Resistance
Poor Compression Set Resistance
Excellent Short-Term Resilience

Fluorosilicone

Standard: -80°F to 350°F
Specialty: -100°F to 350°F Jet Fuel
Dry Heat
Wide Temperature Range
Some Petroleum Oils
Chlorinated Solvents Ketones (MEK)
Phosphate Esters
Some Acids
Auto / Aircraft Brake Fluids
Amines (Ammonia) Aerospace O-rings and Aerospace Rubber Sheets (SAE Compliant O-rings, AMS O-rings, MIL O-rings)
Automotive Compliant O-rings and Gaskets
Chemical Processing O-rings (CPI Gaskets) Poor Wear Resistance
Moderate Compression Set Resistance
Moderate Short-Term Resilience
Poor Permeation Resistance

Teflon® Encapsulated

Varies with O-ring Energizer Material Chemical Resistance
Heat Resistance
High Pressure Seals Hardware Requiring a Stretch Fit
Fitting Over Sharp Edges or Burrs Chemical Processing O-rings (CPI Seals)
Chemical Handling O-rings
Chemical Storage O-rings Good Wear Resistance
Good  Short-Term Resilience
Good Permeation Resistance

Teflon®

Standard: -250°F to 450°F
Specialty: -300°F to 500°F O-ring Chemical Compatibility
Fuel Resistance
Low Coefficient of Friction Hardware Requiring a Stretch Fit
Fitting Over Sharp Edges or Burrs Chemical Processing Gaskets (CPI Seals)
Chemical Handling Gaskets
Chemical Storage Gaskets Good Wear Resistance
Low Coefficient of Friction

Material

Temperature Range

Relative Price

Recommended Uses

Not Recommended For

Common Industry Applications:

Mechanical Properties

The temperature ranges presented above are approximations for dry air service only and should not be used to determine design specifications or end-use temperature limits. Actual temperature range of a compound in an end-use application is highly dependent on part type, hardware configuration, applied forces, chemical media, pressure and thermal cycling effects, and other factors. The most practical way of determining an end-use temperature range is testing in the actual application conditions. Consult a Marco Engineer for more details.

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.

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.

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