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A comment on How to make a leather piston seal (2007). Parent comment

Re:How to make a leather piston seal (2007) by dwater on Thursday July 22, 2021 @09:42AM (#27918719)
There are fuel resistant rubbers available, most commonly Viton/FKM. They are commonly used in automotive applications.

https://en.wikipedia.org/wiki/FKM

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