50 Durometer Commercial Grade EPDM Sheet
50 Durometer Commercial Grade EPDM Sheet is a soft-durometer ethylene propylene diene monomer (EPDM) sheeting compound offering a service temperature range of -40 to +220°F with a tensile strength of 1450 psi and elongation of 400% — the highest tensile and elongation values in the Commercial Grade EPDM Sheet line. The material is compliant with RoHS, REACH, and California Proposition 65 and is manufactured in the USA. At 50 Shore A, this grade provides maximum conformability for applications requiring an EPDM elastomer that seals effectively against irregular or low-load contact surfaces. Available – cloth-inserted (CI) construction for enhanced dimensional stability.
Key Properties
- Hardness, Shore A: 50 ± 5 (ASTM D2240)
- Tensile Strength: 1450 psi (ASTM D412)
- Elongation: 400% (ASTM D412)
- Service Temperature Range: -40 to +220°F
- Compliance: RoHS, REACH, California Proposition 65
- Polymer: EPDM (Ethylene Propylene Diene Monomer)
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Typical Value | Test Method |
| Hardness, Shore A | 50 ± 5 | ASTM D2240 |
| Tensile Strength, psi | 1450 | ASTM D412 |
| Elongation, % | 400 | ASTM D412 |
| Temperature Range | -40 to +220°F | — |
Compliance
- RoHS — Compliant
- REACH — Compliant
- California Proposition 65 — Compliant
- Gaskets and seals on irregular or low-load flange surfaces
- Weather sealing and environmental enclosure gaskets
- HVAC system seals and duct gaskets
- Outdoor and UV-exposed sealing applications
- General industrial water and steam sealing
Common industries: HVAC, Building & Construction, Industrial Manufacturing, Outdoor Equipment, General Sealing.
50 Durometer Commercial Grade EPDM Sheet is the softest grade in the Commercial Grade EPDM Sheet line, offering 50 Shore A hardness with the highest elongation (400%) and tensile strength (1450 psi) in the series. The soft durometer profile allows the material to conform readily to uneven or irregular sealing surfaces under low clamping loads, making it well suited for gasket applications where surface finish or bolt-load limitations would prevent a firmer grade from seating properly.
The -40 to +220°F service temperature range supports both cold-environment installation and elevated-temperature service, and the EPDM polymer provides inherent resistance to weathering, ozone, UV exposure, water, and steam — properties that make it a strong choice for outdoor, HVAC, and general industrial sealing applications. The material is RoHS compliant, REACH compliant, and California Proposition 65 compliant, and is manufactured in the USA.
What differentiates 50 Durometer Commercial Grade EPDM Sheet from the 60 Durometer and 70 Durometer grades?
50 Durometer Commercial Grade EPDM Sheet is the softest grade in the line, providing the greatest conformability and the highest elongation (400%) and tensile strength (1450 psi) of all three grades. 60 Durometer Commercial Grade EPDM Sheet offers a mid-durometer profile with an ASTM D2000 M2AA606 C12 F17 specification, and 70 Durometer Commercial Grade EPDM Sheet is the firmest grade, providing the highest compression resistance for high-load sealing applications.
Why is a soft durometer EPDM sheeting grade beneficial in certain sealing applications?
A softer durometer allows the gasket material to flow into surface irregularities under lower clamping forces, achieving an effective seal where a firmer grade would leave leak paths. This is particularly important on cast or machined surfaces with visible tool marks, on flanges with low bolt-load capacity, or in designs where gasket compression is limited by the surrounding structure.
What is the service temperature range for 50 Durometer Commercial Grade EPDM Sheet?
The service temperature range is -40 to +220°F, as listed on the Technical Datasheet.
Is 50 Durometer Commercial Grade EPDM Sheet suitable for outdoor and UV-exposed applications?
Yes. EPDM polymer provides inherent resistance to weathering, ozone, and UV radiation, making all grades in the Commercial Grade EPDM Sheet line well suited for outdoor exposure. The -40°F lower temperature limit also supports cold-climate installation and service.
How should 50 Durometer Commercial Grade EPDM Sheet be specified?
Specify grade (50 Durometer Commercial Grade EPDM Sheet), thickness, compliance requirements, dimensional tolerances, and finished format.
