Choose EPDM for most outdoor door, window, vehicle and truck seals – it is weather-resistant, tough and economical. Choose silicone when the seal must handle high temperatures (above about +120 °C), must be clear or very soft, or must use a food-contact compound; it costs more and tears more easily.
Side-by-side
| EPDM | Silicone | |
|---|---|---|
| Typical temperature range | about –40 to +120 °C | about –60 to +200 °C |
| UV / ozone / weather | Excellent | Excellent |
| Tear and abrasion | Good | Low |
| Transparency | No (black / colours) | Clear possible |
| Oil resistance | Poor | Fair |
| Relative cost | Low to medium | High |
Typical values for general-purpose grades.
Use EPDM for
Door and window weatherstrip, car door and trunk seals, truck door lips, glazing gaskets, outdoor enclosures.
Use silicone for
Oven and appliance door seals, high-temperature gaskets, clear door bottom sweeps, soft cushioning seals and food-box rings (compound specified at order).
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.