I use PBR rubber grease " specially formulated for use in automotive braking systems ", You should be able to get it or something similar at an Automotive brake repair/reconditioning outfit

I use dedicated ATE breaking-grease for a long time now, and completely happy with it.
the one I use is transparant and looks a bit like jelly-butter and comes in a blue tube.
it should be widely available as ATE is a known brand for car braking systems.

Bertus

As far as assembly lube goes brake fluid is probly OK if you assemble immediately and seal off the system , but being hydroscopic brake fluid aint great if you were cleaning and reassembling with a view to long term storage ( mothballing spare parts ) as it will absorb moisture and cause corrosion.
I just did a google on PBR and guess what? Pbr brakes were fitted to the Z06 corvette and are still standard equipment on Chev , Ford , Dogge , cadilac Chrysler , Toyota, Nissan, Renault and Fiat , manufactured in Knoxville , Colombia and Detroit Plants , Not surprized you havn't heard of it Phil , are you sure that was cheap American beer you were drinking and not brake fluid , I mean I could understand not being able to tell the difference

Watched the video's,bought the kit,installed it all yesterday. All appears ok. The calipers were filthy,so they have been cleaned with brake cleaner,cotton buds for the tricky places and an old toothbrush for the really thick crap. I checked the first seal,and tried to pick the high side by eye and feel. No luck,but put it in and it felt like it should (high side to the back). Put the next one in slightly,and it felt the same. Turned it around,and it felt the same?

So,have I done it wrong and got the seals in backwards? I even got a vernier out to see if it could measure the difference. It couldn't. Last thing I want to do is sail into a corner and find the brakes are just there as show pieces. Is there a definite way to determine if they are in correctly? Something like smooth and easy to get the piston in,and firm and tight to get it out again,they are in correctly. Vice Versa if they are in backwards.

The other one, is should the pistons have gone in with a little brake fluid in the bore,so when the piston is pushed to the bottom,all the air is expelled? I'm having a bit of a problem getting the brakes to bleed correctly.

Cheers.

Nick.

Can't help you there, Nick.
I removed and cleaned out one of the calipers and seals, but also had difficulty with the bleeding (thing ).
I can't tell whether there is a 'right way round' for the seals either.
Anyone?

p.s. Work has stopped on my bike anyway, due to too many other commitments. Maybe next year .