O-Ring Material Database

Professional material selection guide with comprehensive specifications, chemical compatibility, and temperature ratings for critical sealing applications.

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Quick Material Selector

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High Temperature

FKM, FFKM, Silicone

-40°F to +400°F

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Chemical Resistance

FFKM, FKM, EPDM

Acids, Bases, Solvents

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Water & Steam

EPDM, NBR, Silicone

Hot water, steam service

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General Purpose

NBR, HNBR

Standard industrial use

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Material Property Comparison

Material Temperature Range Durometer Chemical Resistance Oil Resistance Water Resistance Applications
NBR (Nitrile) -40°F to +248°F (-40°C to +120°C) 70A, 90A Good Excellent Good Hydraulic, automotive, general sealing
FKM (Viton®) -4°F to +428°F (-20°C to +220°C) 75A, 90A Excellent Excellent Fair High temp, chemical, aerospace
EPDM -67°F to +302°F (-55°C to +150°C) 70A, 80A Excellent Poor Excellent Water, steam, brake fluid
Silicone -67°F to +482°F (-55°C to +250°C) 50A, 70A Fair Poor Good Food grade, high/low temp
HNBR -40°F to +302°F (-40°C to +150°C) 80A, 90A Good Excellent Good Automotive, oil field, high pressure
FFKM (Kalrez®) -15°F to +608°F 75A, 90A Excellent Excellent Excellent Semiconductor, pharmaceutical
NBR

Nitrile (NBR)

Temperature: -40°F to +248°F (-40°C to +120°C)
Durometer: 70A, 90A
Key Benefits: Excellent oil resistance, cost-effective

Common Applications:

  • Hydraulic systems
  • Automotive sealing
  • General industrial use
  • Pneumatic systems
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FKM

Fluorocarbon (FKM)

Temperature: -4°F to +428°F (-20°C to +220°C)
Durometer: 75A, 90A
Key Benefits: High temperature, chemical resistance

Common Applications:

  • Aerospace systems
  • Chemical processing
  • High temperature sealing
  • Automotive engine bay
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EPDM

EPDM Rubber

Temperature: -67°F to +302°F (-55°C to +150°C)
Durometer: 70A, 80A
Key Benefits: Excellent water/steam resistance

Common Applications:

  • Water systems
  • Steam applications
  • Brake fluid sealing
  • Outdoor weathering
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SIL

Silicone Rubber

Temperature: -67°F to +482°F (-55°C to +250°C)
Durometer: 50A, 70A
Key Benefits: Wide temperature range, food safe

Common Applications:

  • Food & beverage
  • Medical devices
  • Extreme temperatures
  • Pharmaceutical
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Chemical Compatibility Quick Reference

Petroleum Products

Motor Oil
NBR FKM EPDM SIL
Gasoline
NBR FKM EPDM SIL

Water & Steam

Hot Water
NBR FKM EPDM SIL
Steam
NBR FKM EPDM SIL

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