There are a couple of PVA based fabric adhesives available. The fabric sources (Frank's, Falcon East, etc) have their own varieties as does the aforementioned UnitedMS. Some of the names are Mighty Muck, Miracle Muck, etc.
The properties that set these glues apart from other PVA products are: they are heat reactivated, they maintain their elasticity, and they don't give off any undesirable nasties (I'm just so tired of "archival")in the frame package.
I use them for hand wrapping mats and liners, and sometimes for sticking other non-fabric things together...I use it to adhere my dust covers, to laminate my shims when making a shadow box, and in a pinch, I've been known to use it to join frames (makes for an incredibly strong bond).