Engineered for extremes
EPDM H2 60P
Read the code: EPDM, H2 duty (hydrogen service), 60 Shore A, P for peroxide cure, recipe 01.
Development grade. The values below are design targets, not measured results. Each target becomes a typical value, with the number of lots and the test report behind it, as testing is completed.
A 60 Shore A peroxide-cured EPDM for PEM fuel cell stack gaskets and balance-of-plant seals: low compression set at 90 to 120 °C for a low closing force over a long life, resistance to humidified hydrogen and air, acidic product water and glycol coolant, low ionic extractables, flexibility for cold starts to −40 °C, and no fluorine.
- Polymer class
- EPDM
- Duty
- H2: hydrogen service
- Hardness
- 60 Shore A
- Temperature range
- -40 to 120 °C
- Lead time
- Trial quantities on request
- Minimum order
- 25 kg
- Issued
- 2026-10-28
- Revision
- A
- Packing
- Per order
Design targets and release limits
| Property | Target | Limits | Unit | Method |
|---|---|---|---|---|
| Hardness | 60 | 55 to 65 | Shore A | ASTM D2240 / ISO 48-4, 1 s |
| Tensile strength | 10 | min 8 | MPa | ASTM D412 die C / ISO 37 type 2 |
| Elongation at break | 350 | min 250 | % | ASTM D412 die C / ISO 37 type 2 |
| Compression set, 22 h at 120 °C | 12 | max 20 | % | ASTM D395 method B, button |
| Compression set, 1,000 h at 90 °C | 20 | max 30 | % | ISO 815-1 |
| TR10 | -50 | max -45 | °C | ASTM D1329 / ISO 2921 |
| Dilute sulfuric acid at pH 3, 1,000 h at 90 °C, hardness change | -2 | -5 to 5 | points | ASTM D471 / ISO 1817 |
| Ethylene glycol and water (50/50), 1,000 h at 90 °C, volume change | +2 | max 6 | % | ASTM D471 / ISO 1817 |
| Ionic extractables, 168 h at 90 °C in deionised water | To report | Agreed with the stack maker | Ion chromatography of the soak water |
Qualification plan
The grade code says what this compound is designed for. This table says what it has passed: a duty is claimed only once its report is on file.
| Test | Standard or method | Conditions | Status |
|---|---|---|---|
| Acid ageing | In-house method, published with results | Dilute H2SO4 at pH 3, 90 °C, 1,000 h, with compression set and stress relaxation | Planned |
| Coolant ageing | ASTM D471 / ISO 1817 | 50/50 ethylene glycol and water at 90 °C, 1,000 h | Planned |
| Extractables | Ion chromatography and conductivity of the soak water | 168 h at 90 °C in deionised water | Planned |
| Compression stress relaxation | ISO 3384 | At 90 °C and 120 °C, 1,000 h | Planned |
| Stack qualification | IEC 62282 series, with a stack maker | On the customer's bipolar plates | Planned |
Design targets are the values the compound is designed to reach. They are not measured results and they are not a warranty. Release limits apply to lots once the recipe is approved. The grade code says what the compound is designed for; the qualification plan says what it has passed. Confirm suitability in your own application and fluids.
Every lot is supplied with a certificate of analysis. Enter the lot ID under Track on the website to see the lot record. Pascalor is an independent brand and is not affiliated with any polymer manufacturer named elsewhere on this site.
Registered entity name to be added | quotes@pascalor.com