SealSpec / Custom gaskets / EPDM sponge
EPDM sponge gaskets
Custom-cut epdm sponge gaskets (EPDM, closed-cell): where it works, where it fails, typical properties, and how to call it out on a drawing. Use the builder to spec your part in this material.
Typical properties
| Polymer | EPDM, closed-cell |
|---|---|
| Form | sponge |
| Service temperature | -40 to 250 °F |
| Firmness | Soft / Medium / Firm |
| Common thicknesses (in) | .062, .125, .187, .250, .375, .500 |
Typical ranges for the material family. Specific grades differ: confirm on the datasheet.
Strengths
- Excellent weather, UV and ozone resistance
- Good water and steam resistance
- Economical for outdoor seals
Watch out for
- Not for petroleum oils, fuels or solvents
- Higher compression set than silicone
Typical applications
- Outdoor enclosures and cabinets
- HVAC panels
- Automotive body seals
- Solar and EV charging hardware
Specs and standards to reference
- ASTM D1056
- UL 50E enclosure-gasket grades exist
Chemical check: see EPDM ratings across 2,088 fluids →