- I am rebuilding the master cylinder, In the kit is says to use a luubricant called PROTECT-A-CUP (I don't have it) is this neccasary to use? If so where can I get this or what can be substituted?
It's simply called brake grease. It's widely supplied with Girling rebuilt kits, red in color and compatable with brake fluid. I carry it if you can't find it.Regards,Robert Kirk