perhaps Red Rubber grease and brake fluid
 

I am reassembling my front brake caliper with new seals and new piston.
It comes with a sachet that looks to contain red rubber grease and says smear on seal and piston

Even putting it on the lip of the piston, some will end up inside the caliper where the brake fluid is.

Will this be ok or will the brake fluid react badly with what looks like red rubber grease?

macafee2

I think I have found the answer on the internet
https://www.frentech-uk.co.uk/freque...0brake%20fluid.

It says :-
Red rubber grease is compatible with DOT3/4 and 5.1 brake fluids. No mineral oils or greases may be used in places that come into contact with brake fluid.

macafee2

You have found the answer lol

I used a combination of both, and smeared a thin layer of the grease on the surface of the piston in the hope to help with lubrication as the brake fluid deteriorates, as well as hopefully protecting from moisture. In reality I imagine it will dissolve eventually with the fluid though.

Also.use the rubber grease onto the slider pins and their rubbers too remembering to replace their caps too.

Sent from my SM-A600FN using Tapatalk

Thanks, piston went in quite easily but I will be dammed if I can get the dust cover to stay in place. Struggling to get the piston back out.
Will try to remove piston and see if I can fit dust shield then fit piston but that will be tomorrow


macafee2

Lock wire works well on jobs like these. I use it on the rubber ball joint covers. If you have the correct pliers for it they will even make it look neat.

The dust shield has a metal ring in cased in the seal around its base where it fits onto the caliper. I think they is a tiny grove for it to fit into but at the moment, super glue may be better :)

macafee2

I never had an issue with mine, the seals just pressing into place. When I did them, they had been recently blasted and painted, so everything was very clean and smooth. Is the flange smooth and clean?

seems clean, i did wire brush most of it and scrap what i could not get to with the brush with a bent screw driver. wipes clean with meths

macafee2