The polyurethane foam I'm talking about is the fairly coarse, rigid, very hard to compress, white foam used as the basis for making surfboards, flotation in water/boats, and as protection when shipping heavy objects. It is very tough foam, not easily compressible, or torn/damaged, and has a coarse, open cell, outer structure.
It is not the cheap, smooth, white, compressed styrofoam made of pellets that can easily be destroyed at the slightest touch, nor the really compressible foam used for topping bedding.
I've found that Liquid Nails glues the poly foam to itself quite nicely, since it is coarse, and open celled.
However, when attempting to glue a bit of styrene sheeting to it, the results were less than satisfactory, using the same glue. I suspect it is due to the smooth finish of the stryene sheeting, and the fact that the Liquid Nails did not melt the styrene at all.
So, I'd like to know if anyone has any experience with this?
I suspect a good epoxy glue might work, since that's what they use for making surfboards, but would prefer something inexpensive, somewhat flexible, less toxic, and easy to apply to the foam and styrene, if possible.
I was thinking that perhaps Contact Cement might work, but am not really sure.
Ideally, if I can find a single glue that works on styrene plastic, polyurethane foam, and extruded polystyrene foam too, that would be superb.
From the bit of info I have been able to find, I know I need to avoid petroleum-based glues.
Based upon this guide, it appears Contact Cement may be the answer:
link
So, has anyone used Contact Cement to glue rigid foams to styrene plastic, with success?