General Motors (GM) tasked Morgan Polymer Seals to collaborate with Illinois Tool Works (ITW) to design a mechanical seal for a new capless refueling system in the Cadillac CT6. The custom seal system had to reduce hydrocarbon emissions, seal on the fuel fill-nozzle, and remain flexible at a temperature down to -40°C. To avoid a larger redesign of the car’s body, the sealing system also had to fit within the sedan’s existing size constraints.

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