What Happens If You Put Mineral Oil In DOT Fluid Brakes?

I don't recommend it but it seems some people do it.
I know some Hope (RX4SH) brakes use mineral oil and also some SRAM (DB8) but the ones that use DOT 4 and 5.1 this ones for you. .

[@Slav-ig7cj]

Probably the same thing will happen if use mineral oil based grease to assemble the brake. It is worth using silicone or a specialty grease such as Sram DOT or the popular TRW PFG110 based on PAG oils. They are safe for EPDM elastomer.

[@funnyfish9360]

how long would it take for the brakes to fail, say you were to mistakenly put the wrong fluid in? ( asking for a friend )

[@Chambers36TheEnter]

I can't be sure as I've not done it myself but I have purchased a lot of brakes with this issue, the sellers said they had changed the fluid only a few months ago so it seems like you have about 4-8 weeks before things start to become apparent.
That was mineral oil in DOT fluid brakes, I'd imagine DOT fluid on a mineral oil seal will react a lot quicker.

[@funnyfish9360]

@@Chambers36TheEnter okay thank so much for the info it helps a lot! Unfortunately I made the mistake of putting dot fluid in my rear brake that is meant for mineral oil. So I’m shopping for a new rear brake set now haha

[@thisisabsolutelystup]

​@Chambers36TheEnter what's the best way to clean out brakes which have had the wrong oil in? Do they need a total rebuild?