There is a thread on the chemical composition of PTFE tape (Teflon tape) here: Master cylinder leak but my question is, will PTFE tape stand up to the heat generated by front disc brakes? Or, will the heat generated melt it and just make a messy goop that no longer really seals?
EDIT: Applying a little Google-foo to the problem turned up this:
[PTFE is a white solid at room temperature, with a density of about 2.2 g/cm³. According to DuPont its melting point is 327 °C (620.6 °F), but its properties degrade above 260 °C (500 °F).
So the question can be refined to is that high enough to avoid problems with front disc brakes? Since the tire begins to soften to the point of not working well at roughly 160 to 170 deg C (320 to 338 deg F) it should be fine.
Does this match what folks have seen or tested in the real world? Is there a downside to using PTFE tape on brake bleeders, like bits of the tape getting into the brake line?
(The quote comes from here: https://answers.yahoo.com/question/index?qid=20070824070354AAUaCbi )