High Performance and Custom O-Rings Fast
Don't Settle for Catalog Commodity O-Rings - Differentiate Your Sealing Performance
Order o-rings from the world’s largest inventory and production network for quick delivery of commodity or specialty materials. With a diversified network of o-ring manufacturers spanning the entire globe, you can rely on Marco Rubber to supply all your o-ring needs, fast and efficiently. Simple online ordering and live customer service further streamline the purchasing process. For specialty requirements such as high temperature or large size, our facilities accommodate o-ring customization with no tooling fees.
MATERIALS FROM COMMODITY TO SPECIALTY:
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O-Ring Customization Examples:
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 | Markez® Next generation FFKM perfluoroelastomer.Compare properties and cost to Kalrez® and Chemraz®. |
BUY STANDARD AND CUSTOM O-RINGS FROM EXPERTS
| Need parts fast? Millions of O-Rings and seals available for same day shipping supplemented by an integrated worldwide network. Emergency production runs often delivered faster than some take to process specialty quotes. Our experienced team responds to basic requests within hours if not minutes and complex same day or next day. |
| Custom size or specialty material Nearly all custom size O-Rings, washers, square rings, and X-Rings in almost every material are supplied without tooling fees. We design and manufacture custom shapes and develop specialty materials to deliver a performance advantage. |
| Live customer service Communicate directly with our dedicated team of experienced professionals empowered to find creative ways to deliver service solutions. Typical office hours M-F 8:30am-5pm EST and we respond to email in hours if not minutes. |
| Engineering assistance The Marco sales team is backed by expert engineers available for on demand conference calls to offer application specific material and design support. |
| O-Ring Size Charts USA Parker 2- AS568A, JIS Japanese, Common Metric, BS British | Groove Design Assistance Groove Design Charts and Considerations |
| Material Comparison Guide Elastomer Materials vs. Common Application Environments | Chemical Compatibility Guide Fluid Compatibility Ratings for Common Elastomer Materials. |
| Mil-Spec Reference Chart A Chart of the Common Military Specifications | O-Ring Failure Analysis Images and Descriptions of Common Failures |
Popular Material Comparison Guide
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 material 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) | |||||||||||||||||
Sorry, no results found.
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.
This guide is intended for general reference use only.
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)
O-Ring Kits and Accessories
Marco Rubber Stocks High Quality Mil-Spec and Commercial Seals from:
 | Parker Seal Seals and Accessories |
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Marco Rubber also Stocks:
View the Seals Page for alternative sealing needs.
