yep, galgal is indeed used, but i'm not sure if that's the colloquial term for sap, or the name of the tree itself.
incidentally, i'm working on a kris right now that somehow the tang of the blade is protruding from the handle; i believe the wood shrunk and eventually pushed it out. fortunately, i was able to salvage the galgal, first time i've done that, so i could actually refit the blade using the original resin. here's the picture of the galgal:
