EPDM O Rings

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EPDM O-Rings – Water, Steam & Brake Fluid Compatible Seals

EPDM (Ethylene Propylene Diene Monomer) O-rings are the ideal choice for sealing water, steam, brake fluid, and glycol-based coolants. They're widely used in plumbing, automotive brake systems, and food-safe environments.

✅ Why Choose EPDM O-Rings?

  • Excellent resistance to hot & cold water
  • Compatible with DOT brake fluid (glycol-based)
  • Highly resistant to weathering, ozone & ageing
  • Non-conductive and low permeability to gases

🛠️ Common Uses

  • Car brake calipers & master cylinders
  • Domestic & industrial plumbing
  • Steam and hot water systems
  • Radiator and HVAC seals

📏 Sizes & Specs

  • Wide range of metric and imperial sizes
  • Standard hardness: 70 Shore A
  • Temperature range: –45 °C to +150 °C

⚖️ EPDM vs Nitrile vs Silicone – Which to Choose?

Feature EPDM NBR (Nitrile) Silicone
Temp Range –45 °C to +150 °C –40 °C to +120 °C –50 °C to +200 °C
Water Resistance Excellent Good Good
Oil Resistance Poor Good Poor
Brake Fluid Resistance Excellent Poor Poor
Weather/Ozone Resistance Excellent Limited Excellent

🧡 Why Buy EPDM O-Rings from SealWithSelo?

  • Wide range of metric and BS sizes in stock with no minimums
  • Each O-ring individually bagged and labelled
  • Order singles or packs – your choice
  • Quick UK shipping & friendly support