Plan a trial for your application
Extruded weatherseals
Compare die swell, surface finish, dimensional stability and cure rate.
Weather-resistant elastomer parts
Under intended exposure, evaluate tensile properties, hardness and compression set after aging.
Purchase specifications and incoming inspection
Use these properties to compare grades within the product family. Example figures refer to the cited grade or source. Confirm the offered specification, packaging and lead time in the quotation. ARLANXEO · EPDM products and applications ↗
| Property | Unit | Published or agreed specification | Test conditions and checks |
|---|---|---|---|
| Ethylene content | % by mass | Confirm against the offered grade and purchase specification | Express on the polymer matrix basis. |
| Diene type and content | % by mass | Confirm against the offered grade and purchase specification | Check the actual grade offered and the cure system. |
| Mooney viscosity | MU | Confirm against the offered grade and purchase specification | Specify test temperature, rotor and oil-extension status. |
When approving a sample, record the grade, methods, limits and specification revision. On receipt, match the packing lot number to the lot-specific COA and record the measured values and release decision.
From samples to commercial delivery
Packaging and receiving
Check bale net weight, wrap and oil-extension declaration. Agree feed arrangements separately for irregular granules or crumb.
Storage and handling
Record bale number at sampling. Avoid mixing visually similar grades with different diene specifications.
Sample and order lead times
State processing equipment, trial batch size and monthly demand. Confirm same-grade samples, first-order MOQ, staged deliveries and arrival date.
Questions from the plant
Does equal hardness imply similar compression set?
Compare at equal cure, compression, temperature and duration.
Should an EPDM grade change trigger a new cure curve?
Check diene composition and run the same formulation. Record scorch and optimum cure times.
Report a delivery or batch issue
Include the order number, lot number from the package, label photos and inspection records for the affected lot. When retesting, check Ethylene content, Diene type and content, Mooney viscosity.
Request documents for your application
TDS · Technical data sheet
For grade selection and sample approval, specify the grade and revision required.
SDS · Safety data sheet
Specify the country or region of use and the required language.
COA · Certificate of analysis
Request a sample COA during supplier review. For incoming inspection, provide the actual lot number.