O-Ring Material Chart Interactive Comparison Guide
O-ring material selection is critically important for the success of your application. The o-ring material comparison chart below offers a quick reference of o-ring material performance. When you find one that fits your application, click on the o-ring material for a deeper dive on technical specifications to further assist you in o-ring material selection.
Marco Rubber is the world’s largest o-ring inventory network and leverages direct purchasing power to offer the lowest o-ring prices. Find the o-ring material you need and order online today for fast shipping and reliable service.
If you don’t see what you need, contact an application engineer for assistance in selecting the compound that provides the best combination of performance and price for your specific application.
Filter Popular O-Ring Materials by Performance Compatibility Attribute
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.
Marco CPD# | Base Material | Color | Duro (Shore A) | Relative Price | Typical Inventory Level | High Temp (F) | Low Temp (F) | Steam < 300 F | Steam < 400 F | Compression Set | Chemical & Solvents | Sunlight, Ozone, UV | Wear Abrasion | Permeation Vacuum | Petroleum Oils & Hydraulics | Fuels & Gas | Brake Fluids |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 = Great 2 = Good 3 = Fair 4 = Poor | |||||||||||||||||
| Scroll Down for More | |||||||||||||||||
| FFKM | FFKM, Kalrez®, Markez®, Chemraz®, Simriz®, Perlast®, Parfluor®, FFKM, Perfluoroelastomer | Many | Many |  | Varies | 625 | -40 | 1 | 2 | 2 | 1 | 1 | 2 | 2 | 1 | 1 | 3 |
| High performance mateiral for ultimate chemical and temperature resistance. Kalrez®, Markez, Chemraz®, Simriz®, Perlast®, Parfluor® FFKM Perfluoroelastomer compounds available, or contact us with specific requirements. | |||||||||||||||||
| BUNA-N (NBR) Nitrile | Black | 70 |  | Very High | 250 | -30 | 4 | 4 | 2 | 4 | 4 | 2 | 2 | 1 | 2 | 4 | |
| Lowest cost highest inventory general purpose commodity NBR compound(available in nearly any color and durometer) | |||||||||||||||||
| BUNA-N (NBR) Nitrile | Black | 90 |  | High | 250 | -30 | 4 | 4 | 2 | 4 | 4 | 2 | 2 | 2 | 2 | 4 | |
| General purpose NBR, higher pressure applications | |||||||||||||||||
| BUNA-N (NBR) Nitrile | Black | 70 | | Med | 250 | -30 | 4 | 4 | 2 | 4 | 4 | 2 | 2 | 2 | 2 | 4 | |
| FDA Compliant NBR per 21 CFR 177.2600 for food contact and some medical uses | |||||||||||||||||
| BUNA-N (NBR) Nitrile | Black | 50 | | Med | 250 | -30 | 4 | 4 | 3 | 4 | 4 | 2 | 2 | 2 | 2 | 4 | |
| General purpose softer than standard NBR to help seal rough or warped glands and or lower closure force applications | |||||||||||||||||
| BUNA-N (NBR) Nitrile | Black | 70 | | Med | 275 | -65 | 4 | 4 | 2 | 4 | 4 | 2 | 2 | 1 | 2 | 4 | |
| Higher performance NBR , Improved lower and higher temperature resistance and oil resistance at higher temperature than standard NBR. Similar to Parker N0794-75 and M83461 | |||||||||||||||||
| BUNA-N (NBR) Nitrile | Black | 70 |  | Low | 250 | -30 | 4 | 4 | 3 | 4 | 4 | 2 | 2 | 2 | 2 | 4 | |
| Metal detectable NBR for contamination detection sensors, FDA Compliant per 21 CFR 177.2600 for food contact and some Life Sci uses (additional colors available) | |||||||||||||||||
| BUNA-N (NBR) Nitrile | Black | 70 |  | Med | 275 | -65 | 4 | 4 | 2 | 4 | 4 | 2 | 2 | 1 | 1 | 4 | |
| Military Specification Mil-Spec AMS-P-25732 , formerly MS28775-### per Mil-P-25732C-(1) | |||||||||||||||||
| BUNA-N (NBR) Nitrile | Black | 75 | | High | 275 | -65 | 4 | 4 | 2 | 4 | 4 | 2 | 2 | 1 | 1 | 4 | |
| Military Specification Mil-Spec AMS-P-83461 F ormerly M83461/1-### per MIL-P-83461B#3, improved low temp and hydraulic fluid resistance | |||||||||||||||||
| HNBR Hydrogenated Nitrile | Black | 70 | | Med | 325 | -30 | 2 | 4 | 2 | 3 | 2 | 2 | 2 | 1 | 1 | 4 | |
| General purpose HNBR higher and lower temperature resistance and improved chemical and Freon resistace than tradtional NBR, compatible with most flex fuels | |||||||||||||||||
| HNBR Hydrogenated Nitrile | Black | 90 | | Low | 350 | -12 | 2 | 4 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 4 | |
| Improved explosive decompression resistance HNBR for higher pressure applications in the Oilfield Industry, Norsok M-710 Compliant. | |||||||||||||||||
| FKM Viton® (A) Fluorocarbon | Black | 75 | | Very High | 437 | -15 | 3 | 4 | 1 | 2 | 1 | 2 | 2 | 1 | 1 | 4 | |
| Lowest cost highest inventory general purpose commodity FKM (available in nearly any color and durometer) | |||||||||||||||||
| FKM Viton® (A) Fluorocarbon | Black | 75 |  | High | 437 | -15 | 2 | 4 | 1 | 2 | 1 | 2 | 2 | 1 | 1 | 4 | |
| Military Specification Mil-Spec AMS-R-83248 M83248/1-### per Mil-R-83248 TY-1 CL-1 | |||||||||||||||||
| FKM Viton® (A) Fluorocarbon | Brown | 75 | | High | 437 | -15 | 3 | 4 | 1 | 2 | 1 | 2 | 2 | 1 | 1 | 4 | |
| General purpose brown color FKM to diferentiate from standard black FKM, improved oxidation resistance | |||||||||||||||||
| FKM Viton® (A) Fluorocarbon | Black | 90 | | High | 437 | -15 | 3 | 4 | 2 | 2 | 1 | 2 | 2 | 1 | 1 | 4 | |
| General purpose higher durometer FKM for higher pressure applications | |||||||||||||||||
| FKM Viton® (GLT) Fluorocarbon | Black | 75 | | Low | 437 | -40 | 2 | 3 | 1 | 2 | 1 | 2 | 2 | 2 | 1 | 4 | |
| Lower temperature resistance and improved chemical resistance over standard A type FKM | |||||||||||||||||
| FKM Viton® (F) Fluorocarbon | White | 70 | | Low | 437 | -15 | 3 | 4 | 2 | 2 | 1 | 2 | 2 | 1 | 1 | 4 | |
| Medical Grade USP Class VI compliant, commercial manufactured terpolymer FKM, FDA compliant per 21 CFR 177.2600, 3A Dairy USDA compliant | |||||||||||||||||
| FKM Viton® (ETP) Fluorocarbon | Black | 75 | | Med | 437 | -6 | 2 | 3 | 1 | 1 | 1 | 2 | 2 | 1 | 1 | 3 | |
| Best FKM family chemical resistance , known as Viton® ETP, Viton® Extreme and Super Viton®, improved base, amines, ketones, MTBE, MEK, MIBK resistance | |||||||||||||||||
| FKM Viton® (GLT) Fluorocarbon | Black | 90 | | Low | 437 | -40 | 2 | 4 | 2 | 2 | 1 | 2 | 2 | 1 | 1 | 4 | |
| High performance FKM with higher and lower temperature resistance and harder durometer explosive decompression resistance, Norsok and Nace tested for Oilfiled. | |||||||||||||||||
| FKM Viton® (LTFE) Fluorocarbon | Black | 75 | | Low | 437 | -54 | 2 | 4 | 1 | 2 | 1 | 2 | 2 | 1 | 1 | 4 | |
| Lowest temperature resistant FKM with improved resistance to fuels over standard type A | |||||||||||||||||
| Aflas® (TFE/P) | Black | 80 | | Med | 450 | 15 | 1 | 2 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | |
| General purpose Aflas ®, steam resistant, sour gas resistant, acid resistance, for chemical and oil industries (higher performance Alfas® versions avaialble for oil drilling environmnets) | |||||||||||||||||
| Aflas® (TFE/P) | Black | 90 | | Low | 475 | 32 | 1 | 2 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | |
| Higher performance and higher durometer Aflas®, improved explosive decompression resistance, steam resistance, sour gas resistance, acid resistance, tested to Norsok M-710 for oilfield | |||||||||||||||||
| Fluorosilicone (FVMQ, FSIL) | Blue | 70 | | High | 350 | -80 | 4 | 4 | 2 | 3 | 1 | 4 | 3 | 3 | 1 | 4 | |
| Aerospace Military Specification Mil-Spec AMS-R-25988 M25988/1-### per Mil-R-25988 CL-1 GR-70, jet fuel resistance | |||||||||||||||||
| Silicone (VMQ, SIL) | Orange | 70 | | Very High | 400 | -75 | 3 | 4 | 2 | 4 | 1 | 4 | 3 | 4 | 4 | 4 | |
| General purpose and FDA compliant Silicone per 21 CFR 177.2600 (available in nearly any color and durometer) | |||||||||||||||||
| Silicone (VMQ, SIL) | Orange | 40 | | Low | 400 | -75 | 3 | 4 | 3 | 4 | 1 | 4 | 3 | 4 | 4 | 4 | |
| General purpose softer than standard Silicone to seal rough or warped glands and or low closure force applications | |||||||||||||||||
| Silicone (VMQ, SIL) | Orange | 70 | | Low | 500 | -65 | 3 | 4 | 2 | 4 | 1 | 4 | 3 | 4 | 4 | 4 | |
| Higher temperature resistant Silicone | |||||||||||||||||
| Silicone (VMQ, SIL) | Orange | 50 | | Low | 400 | -103 | 3 | 4 | 2 | 4 | 1 | 4 | 3 | 4 | 4 | 4 | |
| Lower temperature resistant Silicone | |||||||||||||||||
| Silicone (VMQ, SIL) | Clear | 70 | | Low | 400 | -65 | 3 | 4 | 2 | 4 | 1 | 4 | 3 | 4 | 4 | 4 | |
| Clear-Translucent and FDA compliant Silicone per 21 CFR 177.2600 | |||||||||||||||||
| Silicone (VMQ, SIL) | White | 70 | | Low | 480 | -75 | 3 | 4 | 2 | 4 | 1 | 4 | 3 | 4 | 4 | 4 | |
| Medical Grade USP Class VI and FDA compliant Silicone, Platinium Cured, Commercial Manufactured | |||||||||||||||||
| Silicone (VMQ, SIL) | Clear | 70 | | Low | 400 | -65 | 3 | 4 | 2 | 4 | 1 | 4 | 3 | 4 | 4 | 4 | |
| Medical Grade USP Class VI and FDA compliant Silicone, Platinium Cured, Commercial Manufactured | |||||||||||||||||
| Silicone (VMQ, SIL) | Clear | 70 | | Low | 400 | -65 | 3 | 4 | 2 | 4 | 1 | 4 | 3 | 4 | 4 | 4 | |
| Medical Grade USP Class VI and FDA compliant Silicone, Platinium Cured, Clean Room Manufactured | |||||||||||||||||
| Silicone (VMQ, SIL) | Orange | 65 | | Low | 350 | -65 | 4 | 4 | 4 | 4 | 1 | 4 | 3 | 4 | 4 | 4 | |
| EMI RFI Shielding Nickel Coated Graphite filled Silicone, Volume Resistivity 0.10 ohm-cm | |||||||||||||||||
| EPDM (Peroxide Cure) | Black | 70 | | Very High | 300 | -65 | 1 | 4 | 2 | 2 | 1 | 3 | 2 | 4 | 4 | 1 | |
| General purpose peroxide cured EPDM FDA compliant per 21 CFR 177.2600 and NSF61 for drinking water and food contact | |||||||||||||||||
| EPDM (Sulfur Cure) | Black | 70 | | Med | 265 | -65 | 2 | 4 | 2 | 2 | 1 | 3 | 2 | 4 | 4 | 3 | |
| General purpose sulfur cured EPDM with lowest cost at very high volumes | |||||||||||||||||
| EPDM (Peroxide Cure) | Black | 70 | | Low | 300 | -65 | 1 | 4 | 2 | 2 | 1 | 3 | 2 | 4 | 4 | 1 | |
| Chloramine Resistant NSF61 for drinking water, food and dairy contact, peroxide cured EPDM FDA compliant per 21 CFR 177.2600, 3A USDA compliant | |||||||||||||||||
| EPDM (Peroxide Cure) | White | 70 | | Low | 300 | -65 | 1 | 4 | 2 | 2 | 1 | 3 | 2 | 4 | 4 | 1 | |
| Medical Grade USP Class VI compliant EPDM, commercial manufactured, peroxide cured, FDA compliant per 21 CFR 177.2600, 3A Dairy USDA compliant | |||||||||||||||||
| Neoprene® (CR) | Black | 70 | | Med | 250 | -40 | 4 | 4 | 2 | 4 | 2 | 2 | 2 | 2 | 4 | 3 | |
| General purpose Neoprene® | |||||||||||||||||
| Polyurethane (PU, AU) | Translucent | 70 | | Med | 250 | -65 | 4 | 4 | 2 | 3 | 1 | 1 | 1 | 3 | 3 | 4 | |
| High performance 70 durometer Polyurethane | |||||||||||||||||
| Polyurethane (PU, AU) | Translucent | 90 | | Med | 250 | -65 | 4 | 4 | 2 | 3 | 1 | 1 | 1 | 3 | 3 | 4 | |
| High performance 90 durometer Polyurethane | |||||||||||||||||
| Polyurethane (PU, AU) | Translucent | 90 | | Med | 180 | -30 | 4 | 4 | 3 | 4 | 1 | 2 | 1 | 4 | 4 | 4 | |
| General purpose 90 durometer Polyurethane | |||||||||||||||||
| Polyurethane (PU, AU) | Translucent | 70 | | Med | 180 | -30 | 4 | 4 | 3 | 4 | 1 | 2 | 1 | 4 | 4 | 4 | |
| General purpose 70 durometer Polyurethane | |||||||||||||||||
| PTFE Solid (Virgin) Teflon® | White | N/A | | Med | 450 | -250 | 3 | 4 | 4 | 1 | 1 | 3 | 1 | 1 | 1 | 1 | |
| General purpose PTFE extreme chemical resistant ridged plastic only seals in limited applications (consider FFKM for critical leak resistant applications) | |||||||||||||||||
| FEP (Teflon®) Encapsulated Silicone | Orange Core | N/A | | Med | 400 | -80 | 3 | 4 | 3 | 1 | 1 | 3 | 2 | 3 | 1 | 1 | |
| General purpose extreme chemical resistant FEP (Teflon®) cover with encapsulated Silicone Solid core, can have leaking issues in some applications (consider FFKM for critical leak resistant applications) | |||||||||||||||||
| PFA (Teflon®) Encapsulated Stainless Steel Spring | Silver Core | N/A | | Low | 500 | -400 | 3 | 4 | 2 | 1 | 1 | 3 | 2 | 1 | 1 | 1 | |
| High performance extreme chemical resistant FEP (Teflon®) cover with encapsulated Steel Spring core (cosider Spring Energized PTFE Seals for critical applications) | |||||||||||||||||
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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.
