I use Titebond II and heat will soften it.  (Titebond II is polyvinyl acetate, The original Titebond is aliphiatic glue).  Heat will soften both.


Countilaw - there is a product made by Jabsco that will dissolve polyester/epoxy.resins.  Nasty stuff and you normally wouldn't get there with R/C.  It would take forever to get down into a seam, but it might save the day if a batch didn't kick properly when glassing a surface.