I use cheap contact cement (Parfix, from Bunnings) to glue the 36-grit abrasive cloth sheets to the flat steel surface of my flat-disc grinder. That runs serious, solid streams of sparks for long periods of time - it is a 14 inch, 1.5 hp, three phase, belt-drive machine and I use it to its limits most of the time, changing sheets when necessary (I keep a stack of 100-plus sheets on hand). The only time I ever had trouble with the contact cement was when I used expensive spray-on industrial stuff. I can tell you, having a heavy 14 inch abrasive sheet whistle past your ear at 2200 rpm convinces you immediately to review your gluing practices.
The important things are getting the metal surface clean and flat before you attach the new sheet, so your clutch surface will be smooth, following the glue manufacturer's directions, and checking it carefully before you put it into service. I do one thing differently from Murray: I clamp the glue joint for at least 24 hours after pressing the surfaces together. Before I began doing that, I found if I tried hard enough I could sometimes peel the joint apart. For my purposes, that is unacceptable: it is a safety issue.
