http://www.eis-inc.com/oem/catalog/pdfs/cloth/Moxness.pdf I use two half laps of moxness and a layer of 88 (scotch)on 480 and below. On higher voltage terminations I use more half laps based on the mil thickness of the tape i had that day. Otherwise I use varnished cambric like Bjarney said. I like the silicone based stuff better it makes a real nice connection.
I also have done a bunch of internal motor connections with varying types of compounds and tapes. (Stator compound and Fuse a flex) if your interested in hearing about them let me know.
