Poly glue has no strength in a gap wider than 1-2mm. If you just want to fill a large gap use poly glue. Just add extra glue and dampen the surfaces and you'll get lots of foaming. It only needs a min. of 8% moisture to cure. That's really dry wood!. If you want to fill a gap AND have strength, use epoxy. Where poly glues excel is end grain glueing because of the penetration of as much as 2" of end grain.

That said, I'm talking from a wood workers point of view. As a modeler, Poly glues does penetrate foam very well and tends to harden it. It's the best for glueing something to foam. If the sheeting is intact and a tight wood to wood bond can be made and the filling is cosmetic only, then the poly glue would be ideal.


Mark