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Material Guide

Choose the Right O-Ring Material

Start with the real conditions: oil, fuel, water, steam, weather, heat, cold, and flexibility. Use this page to narrow the material before you shop by size.

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Easy to CompareOil, water, heat, cold, and flexibility
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Material Selector

Start with what the O-ring will touch. This tool gives a simple buying recommendation before you jump to the right material collection or ask for help.

What will the O-ring touch?

NBR

Nitrile (Buna-N)
NBR O-Ring

A common choice for oil, fuel, and many hydraulic or general repair jobs.

Oil Fuel Wear Cost Effective
Browse NBR O-Rings ->

EPDM

Ethylene Propylene
EPDM O-Ring

Better for water, steam, weather, and outdoor use where NBR is the wrong fit.

Water Steam Weather Ozone
Browse EPDM O-Rings ->

FKM

Fluorocarbon (Viton)
FKM O-Ring

Choose FKM when heat, fuel, and stronger chemical resistance matter more than low cost.

Heat Fuel Chemicals High Temp
Browse FKM O-Rings ->

Silicone

VMQ
Silicone O-Ring

Known for flexibility and a wide temperature range, especially where both hot and cold matter.

Heat Cold Flexible Wide Range
Browse Silicone O-Rings ->

FFKM

Perfluoroelastomer
FFKM O-Ring

For extreme chemical and high-temperature sealing where performance matters more than cost.

Chemicals Extreme Heat Premium Specialty
Browse FFKM O-Rings ->

Material comparison

This is a buying guide, not a lab report. Use it to narrow the shortlist before you move into exact sizing.

Property / Application NBR (Buna-N) EPDM FKM (Viton) Silicone (VMQ)
Oil & Hydraulic Fluids
Water & Steam
Fuel Resistance
Heat Resistance (Continuous)
Up to 100 C (212 F)
Up to 120 C (248 F)
Up to 200 C (392 F)
Up to 200 C (392 F)
Low Temperature Flexibility
Down to -40 C (-40 F)
Down to -50 C (-58 F)
Down to -20 C (-4 F)
Down to -60 C (-76 F)
Weather & Ozone Resistance
Chemical Resistance
Flexibility
Typical Applications Hydraulics, pneumatics,
oil seals, general purpose		 Water systems, outdoor seals,
weatherstripping		 Aerospace, automotive,
fuel systems, chemicals		 Food & beverage, medical,
high/low temp seals
Poor Fair Good Very Good Excellent

Ready to move from material choice to real products?

Use this page to narrow the field, then go to small packs or switch to support for bulk and custom needs.

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