O-Rings for High-Performance Needs

Buy Standard and Custom O-Rings from Experts

Don't Settle for Catalog Commodity O-Rings. 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

• Markez® (FFKM) Perfluoroelastomer
• Viton® (FKM / FPM) Fluorocarbon
• Chemraz® (FFKM)
• Buna-N (NBR) Nitrile
• Silicone (VMQ / SIL)
• Teflon® (PTFE)
• Ethylene Propylene (EPDM / EPR)
• Fluorosilicone (FVMQ / FSIL)
• Urethane (PU / AU) Polyurethane
• Conductive
• Teflon® Encapsulated (FEP / PFA)
• Vulcanized
• Parker Compounds
• Metric Sizes
• Cryogenic Seals
• Custom Parts
• 2 Dash and 5 Dash Sizes
• AS568
• JIS
• BS

O-Ring Customization Examples

• Nearly Any Size Without Tool Fees
• Any color or durometer Hardness
• Medical Grade, USP Class VI, FDA, Drinking Water NSF-61, 3A
• EMI Shielding, Conductive, Metal Detectable
• Explosive Decompression
• Semiconductor
• Nuclear
• High Temperature
• High Pressure
• Chemical Resistant
• Internal or Surface Lubrication
• Specialty Chemical Resistance
• Extended Temperature Performance
• EMI Shielding RFI Conductive
• Coatings and Treatments
• Specialty Bagging, Labeling, Marking, Kitting or inspection

Popular Material Comparison Guide

Compound #	Datasheet	Base Material	Color	Hardness (Shore A)	High Temp °F (°C)	Low Temp °F (°C)	Steam < 300 °F	Steam < 400 °F	Compression Set	Chemical & Solvents	Sunlight, Ozone, UV	Wear Abrasion	Permeation Vacuum	Petroleum Oils & Hydraulics	Fuels & Gas	Brake Fluids	Features
							GreatGoodFairPoor	GreatGoodFairPoor	GreatGoodFairPoor	GreatGoodFairPoor	GreatGoodFairPoor	GreatGoodFairPoor	GreatGoodFairPoor	GreatGoodFairPoor	GreatGoodFairPoor	GreatGoodFairPoor
B1000		BUNA-N (NBR) Nitrile	Black	70	250 (121)	-30 (-34)	Poor	Poor	Good	Poor	Poor	Good	Good	Great	Good	Poor	Lowest cost highest inventory general purpose commodity NBR compound (available in nearly any color and durometer)
B1001		BUNA-N (NBR) Nitrile	Black	90	250 (121)	-30 (-34)	Poor	Poor	Good	Poor	Poor	Good	Good	Great	Good	Poor	General purpose NBR, higher pressure applications
B1002		BUNA-N (NBR) Nitrile	Black	70	250 (121)	-30 (-34)	Poor	Poor	Good	Poor	Poor	Good	Good	Good	Good	Poor	FDA Compliant NBR per 21 CFR 177.2600 for food contact and some medical uses
B1006		BUNA-N (NBR) Nitrile	Black	50	250 (121)	-30 (-34)	Poor	Poor	Fair	Poor	Poor	Good	Good	Good	Good	Poor	General purpose softer than standard NBR to help seal rough or warped glands and or lower closure force applications
B1083		BUNA-N (NBR) Nitrile	Black	70	275 (135)	-65 (-54)	Poor	Poor	Good	Poor	Poor	Good	Good	Great	Good	Poor	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
B1005		BUNA-N (NBR) Nitrile	Black	70	250 (121)	-30 (-34)	Poor	Poor	Fair	Poor	Poor	Good	Good	Good	Good	Poor	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)
M1000		BUNA-N (NBR) Nitrile	Black	70	275 (135)	-65 (-54)	Poor	Poor	Good	Poor	Poor	Good	Good	Great	Great	Poor	Military Specification Mil-Spec AMS-P-25732 , formerly MS28775-### per Mil-P-25732C-(1)
M1001		BUNA-N (NBR) Nitrile	Black	75	275 (135)	-65 (-54)	Poor	Poor	Good	Poor	Poor	Good	Good	Great	Great	Poor	Military Specification Mil-Spec AMS-P-83461 F ormerly M83461/1-### per MIL-P-83461B#3, improved low temp and hydraulic fluid resistance
R1001		HNBR Hydrogenated Nitrile	Black	70	325 (163)	-30 (-34)	Good	Poor	Good	Fair	Good	Good	Good	Great	Great	Poor	General purpose HNBR higher and lower temperature resistance and improved chemical and Freon resistace than tradtional NBR, compatible with most flex fuels
R1008		HNBR Hydrogenated Nitrile	Black	90	350 (177)	-12 (-24)	Good	Poor	Good	Good	Good	Good	Good	Great	Great	Poor	Improved explosive decompression resistance HNBR for higher pressure applications in the Oilfield Industry, Norsok M-710 Compliant.
V1000		FKM Viton® (A) Fluorocarbon	Black	75	437 (225)	-15 (-26)	Fair	Poor	Great	Good	Great	Good	Good	Great	Great	Poor	Lowest cost highest inventory general purpose commodity FKM (available in nearly any color and durometer)
V1002		FKM Viton® (A) Fluorocarbon	Black	75	437 (225)	-15 (-26)	Good	Poor	Great	Good	Great	Good	Good	Great	Great	Poor	Military Specification Mil-Spec AMS-R-83248 M83248/1-### per Mil-R-83248 TY-1 CL-1
V1003		FKM Viton® (A) Fluorocarbon	Brown	75	437 (225)	-15 (-26)	Fair	Poor	Great	Good	Great	Good	Good	Great	Great	Poor	General purpose brown color FKM to diferentiate from standard black FKM, improved oxidation resistance
V1007		FKM Viton® (A) Fluorocarbon	Black	90	437 (225)	-15 (-26)	Fair	Poor	Good	Good	Great	Good	Good	Great	Great	Poor	General purpose higher durometer FKM for higher pressure applications
V1038		FKM Viton® (GLT) Fluorocarbon	Black	75	437 (225)	-40 (-40)	Good	Fair	Great	Good	Great	Good	Good	Good	Great	Poor	Lower temperature resistance and improved chemical resistance over standard A type FKM
V1118		FKM Viton® (F) Fluorocarbon	White	70	437 (225)	-15 (-26)	Fair	Poor	Good	Good	Great	Good	Good	Great	Great	Poor	Medical Grade USP Class VI compliant, commercial manufactured terpolymer FKM, FDA compliant per 21 CFR 177.2600, 3A Dairy USDA compliant
V1000		FKM Viton® (ETP) Fluorocarbon	Black	75	437 (225)	-6 (-21)	Good	Fair	Great	Great	Great	Good	Good	Great	Great	Fair	Best FKM family chemical resistance , known as Viton® ETP, Viton® Extreme and Super Viton®, improved base, amines, ketones, MTBE, MEK, MIBK resistance
V1090		FKM Viton® (GLT) Fluorocarbon	Black	90	437 (225)	-40 (-40)	Good	Poor	Good	Good	Great	Good	Good	Great	Great	Poor	High performance FKM with higher and lower temperature resistance and harder durometer explosive decompression resistance, Norsok and Nace tested for Oilfiled.
V1086		FKM Viton® (LTFE) Fluorocarbon	Black	75	437 (225)	-54 (-48)	Good	Poor	Great	Good	Great	Good	Good	Great	Great	Poor	Lowest temperature resistant FKM with improved resistance to fuels over standard type A
L1000		Aflas® (TFE/P)	Black	80	450 (232)	15 (-9)	Great	Good	Good	Good	Great	Good	Good	Good	Good	Good	General purpose Aflas ®, steam resistant, sour gas resistant, acid resistance, for chemical and oil industries (higher performance Alfas® versions avaialble for oil drilling environmnets)
L1009		Aflas® (TFE/P)	Black	90	475 (246)	32 (0)	Great	Good	Good	Good	Great	Good	Good	Good	Good	Good	Higher performance and higher durometer Aflas®, improved explosive decompression resistance, steam resistance, sour gas resistance, acid resistance, tested to Norsok M-710 for oilfield
F1001		Fluorosilicone (FVMQ, FSIL)	Blue	70	350 (177)	-80 (-62)	Poor	Poor	Good	Fair	Great	Poor	Fair	Fair	Great	Poor	Aerospace Military Specification Mil-Spec AMS-R-25988 M25988/1-### per Mil-R-25988 CL-1 GR-70, jet fuel resistance
S1000		Silicone (VMQ, SIL)	Orange	70	400 (204)	-75 (-59)	Fair	Poor	Good	Poor	Great	Poor	Fair	Poor	Poor	Poor	General purpose and FDA compliant Silicone per 21 CFR 177.2600 (available in nearly any color and durometer)
S1004		Silicone (VMQ, SIL)	Orange	40	400 (204)	-75 (-59)	Fair	Poor	Fair	Poor	Great	Poor	Fair	Poor	Poor	Poor	General purpose softer than standard Silicone to seal rough or warped glands and or low closure force applications
S1015		Silicone (VMQ, SIL)	Orange	70	500 (260)	-65 (-54)	Fair	Poor	Good	Poor	Great	Poor	Fair	Poor	Poor	Poor	Higher temperature resistant Silicone
S1043		Silicone (VMQ, SIL)	Orange	50	400 (204)	-103 (-75)	Fair	Poor	Good	Poor	Great	Poor	Fair	Poor	Poor	Poor	Lower temperature resistant Silicone
S1020		Silicone (VMQ, SIL)	Clear	70	400 (204)	-65 (-54)	Fair	Poor	Good	Poor	Great	Poor	Fair	Poor	Poor	Poor	Clear-Translucent and FDA compliant Silicone per 21 CFR 177.2600
S1146		Silicone (VMQ, SIL)	White	70	480 (249)	-75 (-59)	Fair	Poor	Good	Poor	Great	Poor	Fair	Poor	Poor	Poor	Medical Grade USP Class VI and FDA compliant Silicone, Platinium Cured, Commercial Manufactured
S1083		Silicone (VMQ, SIL)	Clear	70	400 (204)	-65 (-54)	Fair	Poor	Good	Poor	Great	Poor	Fair	Poor	Poor	Poor	Medical Grade USP Class VI and FDA compliant Silicone, Platinium Cured, Commercial Manufactured
S1037		Silicone (VMQ, SIL)	Clear	70	400 (204)	-65 (-54)	Fair	Poor	Good	Poor	Great	Poor	Fair	Poor	Poor	Poor	Medical Grade USP Class VI and FDA compliant Silicone, Platinium Cured, Clean Room Manufactured
S1081		Silicone (VMQ, SIL)	Orange	65	350 (177)	-65 (-54)	Poor	Poor	Poor	Poor	Great	Poor	Fair	Poor	Poor	Poor	EMI RFI Shielding Nickel Coated Graphite filled Silicone, Volume Resistivity 0.10 ohm-cm
E1000		EPDM (Peroxide Cure)	Black	70	300 (149)	-65 (-54)	Great	Poor	Good	Good	Great	Fair	Good	Poor	Poor	Great	General purpose peroxide cured EPDM FDA compliant per 21 CFR 177.2600 and NSF61 for drinking water and food contact
E1005		EPDM (Sulfur Cure)	Black	70	265 (129)	-65 (-54)	Good	Poor	Good	Good	Great	Fair	Good	Poor	Poor	Fair	General purpose sulfur cured EPDM with lowest cost at very high volumes
E1097		EPDM (Peroxide Cure)	Black	70	300 (149)	-65 (-54)	Great	Poor	Good	Good	Great	Fair	Good	Poor	Poor	Great	Chloramine Resistant NSF61 for drinking water, food and dairy contact, peroxide cured EPDM FDA compliant per 21 CFR 177.2600, 3A USDA compliant
E1074		EPDM (Peroxide Cure)	White	70	300 (149)	-65 (-54)	Great	Poor	Good	Good	Great	Fair	Good	Poor	Poor	Great	Medical Grade USP Class VI compliant EPDM, commercial manufactured, peroxide cured, FDA compliant per 21 CFR 177.2600, 3A Dairy USDA compliant
N1000		Neoprene® (CR)	Black	70	250 (121)	-40 (-40)	Poor	Poor	Good	Poor	Good	Good	Good	Good	Poor	Fair	General purpose Neoprene®
P1000		Polyurethane (PU, AU)	Translucent	70	250 (121)	-65 (-54)	Poor	Poor	Good	Fair	Great	Great	Great	Fair	Fair	Poor	High performance 70 durometer Polyurethane
P1001		Polyurethane (PU, AU)	Translucent	90	250 (121)	-65 (-54)	Poor	Poor	Good	Fair	Great	Great	Great	Fair	Fair	Poor	High performance 90 durometer Polyurethane
P1004		Polyurethane (PU, AU)	Translucent	90	180 (82)	-30 (-34)	Poor	Poor	Fair	Poor	Great	Good	Great	Poor	Poor	Poor	General purpose 90 durometer Polyurethane
P1006		Polyurethane (PU, AU)	Translucent	70	180 (82)	-30 (-34)	Poor	Poor	Fair	Poor	Great	Good	Great	Poor	Poor	Poor	General purpose 70 durometer Polyurethane
T1000		PTFE Solid (Virgin) Teflon®	White	N/A	450 (232)	-250 (-157)	Fair	Poor	Poor	Great	Great	Fair	Great	Great	Great	Great	General purpose PTFE extreme chemical resistant ridged plastic only seals in limited applications (consider FFKM for critical leak resistant applications)
T1002		FEP (Teflon®) Encapsulated Silicone	Orange Core	N/A	400 (204)	-80 (-62)	Fair	Poor	Fair	Great	Great	Fair	Good	Fair	Great	Great	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)
T1021		PFA (Teflon®) Encapsulated Stainless Steel Spring	Silver Core	N/A	500 (260)	-400 (-240)	Fair	Poor	Good	Great	Great	Fair	Good	Great	Great	Great	High performance extreme chemical resistant FEP (Teflon®) cover with encapsulated Steel Spring core (cosider Spring Energized PTFE Seals for critical applications)

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.