From recollection the new caliper bolts come with the thread lock already impregnated into the thread. It's there for a reason - why anyone would want to copper slip over thread lock is beyond me.
Always buy new caliper bolts for the sake of safety and the proper thread lock on.
I dare say you could re use with your own thread lock but they don't cost a lot.
I tried to rebuild but the pistons were so seized I could not remove them or rewind them. even broke the rewind tool!!! So I ended up buying two new calipers - Still got the 8 pistons and seals in my garage - false economy - If any one is interested pm me
James