I had problems last year with poor quality brake fluids and seal wear.
Castrol Response DOT 4 seems to be the answer as it has some self lubricating properties and no longer erodes seals.
several after market clutch/brake people who have no axe to grind [ ie not agents for any particular product ] are suggesting this fluid and it is the one I now use. there probably are other makes that are as good as the Castrol Response, but I now know of two makes that are no good!!
Love to know the two bad makes - I had the same problem some years ago - as I mentioned on another recent thread.
There appears also to be a Castrol Response SUPER DOT 4: wiki.seloc.org/a/Brake_fluid
Gordon
Just been and checked in the garage and the one I am using, and is suggested by one company whose paperwork is on a desk is specifically Resonse DOT 4. I suspect the Super is so similar that no danger of seal damage - maybe a higher boiling point? Try Castrols web site perhaps.