View Full Version : Cheap Sign Foam Alternative

17-08-2011, 10:47 PM
Looking for help in finding material for 3D carving,
Sign foam seems to be what am looking for but too expensive just to have a play.
found high density urethane materials in the US a fair prices but no luck in the UK
If any one can point me to any alternative materials to try would be of great help

Also a Hard finish coating would be a plus

thanks in advance for any input

15-09-2011, 07:29 PM
go to diy store and get some polyeurathane foam for house insulation

15-09-2011, 07:38 PM
go to diy store and get some polyeurathane foam for house insulation

I was going to suggest that. Two part polyurethane foam is good as you can just make a box the right size, work out the mass to mix to get the right density and fill it up. You do have to be quick, otherwise this happens:


You can get it in decent quantities here:


I keep meaning to get some myself for prototyping.

16-09-2011, 05:23 PM
its basically the same stuff just already in a shhet with foil glue on that you can just pull off. the shhets come in up to 6" thick nd you can glue them together and cut with wood saw

20-09-2011, 10:32 AM
how about this



20-09-2011, 12:35 PM
I use these Panel Systems in Sheffield, I buy the precut foam in the attached link. It's not the cheapest way to buy foam but it's handy as it comes in a 2ft x 2ft x 1ft box that protects the foam. It's easy to store and will keep me going for years.

They may have denser foam in 2ft x 8ft sheets, but this grade suits me.