Getting ready to finish my layout board and plan to put some 2" rigid pink insulation board down between the tracks and the plywood to deaden the sound and also to allow me to carve a river into my layout. What's the best glue to use for adhering the pink foam to plywood and also to itself for tunnel building? I know some adhesives can cause foam to disintegrate. I do need to adhere it to the plywood since this board will be stored upright when not in use.
Drew, I went back and checked out your rr, what a beautiful creation! Man, you got talent! As for me, i've used foam (2") over 1x4s, drywall screws and the darn cheapest white glue I can find. Usually the Dollar store. Works great for me!
When using stacked 1/2" foam scraps and white glue to build the scrawny"Mountain"
shown in one corner of my small 9x16 round-the-room attic layout; I pinned the 1/2" sheets with finishing nails until the glue tacked or dried and then commenced carving the foam with a serrated knife, rasp, etc. Elmers works as well as any.
I have used Liquid Nails Foam glue on two different layouts and it is good. But cheap white glue is as good as it gets for glueing extruded foam--if one has the patience to wait until it tacks before proceeding with the next application. However, you can pin the fresh glued foam with finishing nails as long as up to 16p, if necessary, to hold while you proceed more quickly.
It helps to remove the poly skin from blue or pink foam before stacking/glueing [or painting]..
I use all the special and more costly glues mentioned for many applications,but not for foam. You better read the fine print on what you use or you may find cavities in your foam after the fact.