Susan,
Yes, it's the medium I use as the fabric adhesive.
I cook the fabric mats in the dry mount press and some fabrics stick very aggressively, others I can pull off.
I have never had one bubble up, if that's what you're worried about.
Terry,
I got to thinking about the last time I had a glue oozing issue on a mat. The only time I could think of it was when I still sold that beautiful India silk from FFMI and the only way I could get it to stick uniformly to anything was to lay it down when the muck was still a little tacky. I deepsixed those samples and haven't worried about it since. I really can't think of a time when it oozed if you let it dry completely and then reheated it.
The biggest headaches with oozing came with wrapping some lighterweight fabrics (esp. India) on liners. Oy vey, those scoop liners wrapped with silk still give me nightmares! I mean to try the gloss medium on those and see if I can use it with success when it is still a little tacky. Since it is a thinner goop, maybe it won't be as much of an issue. Ah, but, I'm really just thinking out loud. Don't mind me.
Once I heard in Hugh's class that it was C/P, I made the decision there to use it as my "default fabric adhesive." Like you, most of what I frame with a fabric mat or backer has value.
You oughta give the medium a whirl, though. It is very easy to use in comparison to the muck. Just being able to get it more neatly out of the bottle makes it worth it to me.
edie the inthegluingmood goddess