Choisir le bon EPDM O-ring is critical to ensure weather resistance, chemical stability, and durability in your sealing application.
EPDM O-rings offer excellent resistance to steam, UV, and weather conditions, ideal for outdoor and water systems.
Let’s explore how to use EPDM O-rings effectively across industries.
What are EPDM O-rings used for?
EPDM O-rings are made from ethylene propylene diene monomer, which gives them their robust weather and chemical resistance.
Ils sont couramment utilisés dans :
- Steam and hot water systems
- Automotive braking and cooling systems
- Outdoor sealing (HVAC, solar panels)
Are EPDM O-rings chemically resistant?
Yes, EPDM’s saturated polymer structure resists oxidation and UV. It's ideal for polar solvents, steam, and weathering.
| Médias | Résistance |
|---|---|
| Eau | ✅ Excellent |
| Vapeur | ✅ Excellent |
| UV/Ozone | ✅ Excellent |
| Oil/Fuel | ❌ Pauvre |
Need to compare materials? Read the Guide des principes fondamentaux des joints toriques
Can EPDM O-rings be used outdoors?
Absolutely. EPDM performs extremely well outdoors:
- Resistant to UV and ozone
- Doesn’t crack in sunlight
- Handles temperature swings (-50°C to 150°C)
That’s why they’re often used in rooftop solar panels and HVAC systems.
Compare EPDM to FKM in demanding environments
When should you avoid EPDM O-rings?
Do not use EPDM where oils, fuels, or hydrocarbons are present.
| Médias | Use EPDM? | Better Alternative |
|---|---|---|
| Vapeur | ✅ Oui | – |
| UV/Weather | ✅ Oui | – |
| Mineral Oils | ❌ Non | Joints toriques en NBR |
| Fuels | ❌ Non | Joints toriques FKM |
How to choose the right EPDM O-ring?
Use this 3-step checklist:
- Plage de température: EPDM works between -50°C and 150°C
- Exposition aux produits chimiques: Avoid oils, use in polar solvents, water
- Sizing: Measure ID, OD, and CS; verify Shore A hardness
Still comparing with FKM? See our EPDM vs FKM Comparison
Conclusion
EPDM O-rings are your go-to choice for weather, steam, and outdoor sealing—but avoid them in oil-based systems.
Get EPDM O-Rings for your system
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