Joining Foam board

[Anonymous]

I am preparing to build my first large layout using foam insulation for scenery. What is the best bonding material for bonding the sheets of foam?
Reed

[Anonymous]

Liquid Nails from the caulking-gun sized tube.

[Anonymous]

I am using either low-temp hot glue, or Woodland Scenics' Foam Tack Glue.
Depending upon how much working time I need before the glue sets. Hot Glue sets very quickly, the Foam Tack sets in an hour or more. For small areas, I use the hot glue. Large areas get the Foam Tack glue.

I am using multi-temp glue sticks from Wally Mart with a Woodland Scenics Low-temp glue gun. You get 25-30 sticks for the same price as 10 of WS sticks of low-temp glue. Works good, but you have to allow the gun to get to full temperature or the multi-temp won't flow very easily.

The foam tack is also supposed to be water soluable, so if I want to remove a glue joint, I just soak it for a while and it should come loose.

I don't think standard white glue will work with foam as the foam will seal it air tight and prevent the water from evaporating off in the drying process.

I'm sure there are other glues that people use.

Dale B.

[Anonymous]

Liquid Nails now makes one for foam board, some of the other will eat away the foam,

[ndbprr]

I f I were you I would use the liquid nails to glue a board to both ends of the foam. Then from the bottom you can use something like a piece of plywood screwed in to the board to hold sections together. That way it can be dismantled if you ever move or rebuild it without tearing it up. If you make the board about 1" lower than the thickness of the foam you can slip a piece of foam in for filler to keep the noise levels the same

[StillGrande]

The Liquid Nails product is called Liquid Nails Project.

[BR60103]

I use a "green" contact cement by Lepages. This is non-toxic stuff that won't eat the foam. You do have to be careful as it sticks permanently as soon as the two surfaces touch. It's best for assembling layers that will be carved later although I have used it for everything up to laying track -- separate the surfaces with wax paper or pencils and gradually bring them into contact.
I've also used WS scenic paste -- the stuff like thick latex paint.