Recycling EPDM Weatherstrip: Sustainable End-of-Life Options for Truck Door Seals

EPDM weatherstrip is durable, but it does not last forever. When a box truck door seal, a shipping container door weatherstrip, a refrigerated truck and reefer door seal, or a passenger car and commercial vehicle door rubber weatherstrip reaches the end of its life, it comes off. What happens to it then? In the past, it went to landfill. Today, there are better options. Recycling and reusing EPDM waste is a growing part of sustainable fleet management.

EPDM is a thermoset rubber. Unlike thermoplastics, it cannot simply be melted and remolded. But it can be ground up and used as filler in new products. The process is called grinding or pulverizing. The old EPDM weatherstrip is chopped into small granules. These granules are mixed with new EPDM compound and extruded into new seals. The recycled content lowers the carbon footprint.

For a fleet, collecting old seals is easy. When you replace a box truck door seal, the old one comes off. Instead of throwing it in the dumpster, bag it. Store it. Once you have a batch, send it to a recycler.

For a shipping container operator, the container door weatherstrip is replaced during container refurbishment. The old seals can be collected and recycled.

For a refrigerated truck and reefer operator, the reefer gasket often contains EPDM with a fabric or adhesive layer. The recycler must separate the layers. This is possible but costs a bit more.

For a passenger car and commercial vehicle dealer, old door seals are generated during repair and restoration. Collect them.

Beyond recycling, some EPDM weatherstrip can be reused. If the seal is removed intact and has not aged, it can go on another vehicle. This is common in classic car restoration where NOS seals are expensive.

The environmental case is clear. Landfill rubber does not decompose. EPDM in a landfill sits for hundreds of years. Recycling keeps it out of the ground and turns it into new material. It also saves the carbon that would be used to make virgin EPDM.

The practical case is also clear. Some recyclers will pick up the scrap for free or even pay a small amount. The cost is minimal.

For a fleet with sustainability targets, recycling old seals is a visible action. It is easy to document. It supports ESG reporting.

The takeaway is that old EPDM weatherstrip is not garbage. It is a recyclable material. Collect it. Recycle it.

References

- Google Scholar: "Recycling of EPDM Rubber Waste from Automotive Seals", Waste Management, 2020.

- Google Scholar: "Ground EPDM as Filler in New Rubber Compounds", Journal of Applied Polymer Science, 2019.

- Google Scholar: "Circular Economy in Automotive Elastomers", Resources, Conservation and Recycling, 2021.