Weather seals
Ozone and UV matter more than splash oil. Ask whether EPDM is also on the table. Temperature still belongs on the request.
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Buyers often arrive with the question is neoprene rubber the right polymer for this job. Translate that into purchase requirements: medium, service temperature in °F or °C, hardness scale and the documents that must travel with the lot. This page does not promise a field result.
Ozone and UV matter more than splash oil. Ask whether EPDM is also on the table. Temperature still belongs on the request.
Closed-cell vs solid stock, adhesive backing, and compression set (%) under ASTM D395 decide whether the gasket returns after a lid cycle.
CR can be asked for splash oil. NBR or FKM may be the plant preference. Ask for swell data on the quoted compound, not a family brochure.
FDA 21 CFR 177 or UL 94 belong to a named grade. This desk does not certify food contact or flame rating.
Industry dispute on this family is often vulcanized CR versus a thermoplastic elastomer (TPE / TPU) substitute, and CR versus EPDM or NBR for weather versus oil. The table is a buyer checklist. It is not a ranked recommendation.
| Question on site | What to write on the request | Limit this desk will not hide |
|---|---|---|
| Continuous heat at the joint | Service temperature in °F or °C with the medium | Vulcanized CR still has a ceiling; TPE substitutes often weaken above about 120°C continuous service |
| Oil, fuel or solvent splash | Named medium and dwell time | CR is not a universal chemical answer; FKM or NBR may be the factory counter-offer |
| Weather and ozone | Indoor vs outdoor, UV exposure | EPDM is often compared; the factory must say which polymer is on the quote |
| Seal recovery after compression | Compression set method (ASTM D395) and condition | A hardness number alone does not prove recovery |
| Hardness call-out | Shore A or Shore D with the letter | Mixing scales produces two goods that share a number |
Confirm on site: actual medium, peak versus continuous temperature, and whether the part is already drawn. Then write those answers on the inquiry form.
Neoprene Rubber Sourcing will not fill the polymer choice for the plant. We will send the axes you write to more than one factory.
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