Quote:
Originally Posted by INV_MY_370
My Z gets to be a guinea pig , for a 3d printed piston seal. (TPU) Clutch master cylinder . for this to work properly and to last, the oem fluid needs fully flushed and only dot5 added. This is the only fluid to not break down TPU. 
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I’m all for 3d printing things (I’ve got one at home I use frequently), but for something like this why not just use a proper seal? Have you tested to see if TPU will stand up to brake fluid long term?
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