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.
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 10993 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 TM0297 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 TM0297 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 10993 O-rings) Medical Tubing and Seals (USP Class VI Tubing, ISO 10993 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 10993 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: | 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 TM0297 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.
