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
