For outdoor weather seals choose EPDM: it has better resistance to sunlight, ozone and water and costs less. Choose neoprene (CR) when the seal meets some oil or grease or needs moderate flame resistance – neoprene resists oil better than EPDM but ages faster outdoors. If oil contact is constant, use nitrile (NBR); for heat above about +120 °C, use silicone.
Side-by-side
| Property | EPDM | Neoprene (CR) |
|---|---|---|
| Weather / ozone / UV | Excellent | Good |
| Water and steam | Excellent | Good |
| Oil and fuel | Poor – swells | Fair to good |
| Typical temperature (general grades) | about –40 °C to +120 °C | about –35 °C to +100 °C |
| Flame resistance | Burns unless modified | Self-extinguishing grades exist |
| Cost | Lower | Higher |
Where each is used
- EPDM: door and window seals, car weatherstrips, truck door seals, glazing gaskets, outdoor enclosures.
- Neoprene: seals near machinery oil, some marine and HVAC gaskets.
- Nitrile (NBR): fuel and hydraulic oil.
- Silicone: ovens, high heat, food contact – see EPDM vs silicone.
Ordering a custom profile
Tell us the application, contact media and temperature range; we propose the compound and quote the profile. Sampling takes 7–10 days. Raw-material RoHS / REACH test reports are available on request.
Quick questions
Is EPDM or neoprene better for a door seal?
EPDM – it lasts longer outdoors and is cheaper.
Can EPDM touch oil?
Not for long. Mineral oil makes EPDM swell; use neoprene or nitrile there.
Need a seal for this?
Send your section, gap size or a photo of the old seal – Dora replies usually within 2 hours. Custom extruded & moulded rubber parts are available from 10 m.