Hella KG Hueck & Co., which makes headlights for General Motors Europe’s Astra line, has replaced the original EPDM thermoset rubber seal used in the light units with Santoprene thermoplastic vulcanisate (TPV) supplied by Advanced Elastomer Systems (AES). The application was developed by Beckenbach GmbH, which builds injection moulds and manufactures thermoplastic elastomer and thermoset rubber products, systems and parts.