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Does anyone know what type of glue will work on polypropylene? It's a high-impact resin that's generally resistant to solvents so I'm expecting that Testors Plastic Cement won't work. Will Zap-a-Gap work? If not, what outside industrial "welders" would do?

The reason I ask is that I'm considering getting a 2'x2' sheet of corrugated plastic to use as a display board for my army and want to glue terrain bits to it, including flock and rubble if possible. Any ideas or suggestions would be appreciated.

You are pretty much out of luck with polypropylene. No glue will work. At best you can get a plastic welding kit and try that.

You could try getting the polypropylene board and then laminating the the entire board with something like epoxy to a thin sheet of some other material that other glues will work on. You will get a poor bond to the polypropylene but the surface area will be so large it might hold together. I would recommend starting with something else though. You can get plexiglass, lexan, pvc, or styrene sheets in this size.

I'd be concerned about the strength of styrene given what I intend to put onto it. PVC might be an option. I'll investigate/research plexiglass and lexan, too.

Thanks.

What it won't do is glue.
It WILL melt, if thatis an option for you. Soldering Iron will do it.

OR, you can use thumbtacks and hot glue. Polypro won't take a bond from the glue, but if the thing to be glue WILL, then you can make what is called "mechanical fit".

This means that you poke a bunch of holes in the sheet, then glue it. The glue won't stick, but it will go inside the holes and basically 'pin' it.

Good luck.

depending on the thickness and such, you can use toothpicks to pin it.

Toothpicks won't puncture the polypro sheet. A shirt, yes. Sheet, no.

Walla Walla? Whitman?

Could you not drill through, pin and superglue?

Hmm.. a short Google check would indicate not, however it did come up with this Scotch product

http://www.stealth316.com/2-dp8005.htm

Found some 24" x 48" styrene sheet on eBay and bought that. I'll cut it in half and glue the two parts together for a more durable board.

Thanks to everyone for the input.