ProCreate Terrain Putty is an easy to use two part epoxy based putty.
Just mix equal parts hardener and resin and it’s ready to go. I recommend using gloves since the
putty is sticky.

This product has several uses, from sculpting to simple casting using one part molds.
The putty contains no solvents, will not shrink, and will stick to almost anything.

I chose to use the Terrain Putty to fill gaps in a mountain I was making because of its light weight.
Once mixed it had a dough-like consistency. After applying it, I used water to smooth the transitions between
the rock faces. The putty is firm enough to hold its shape and I was able to to use it to make some small ledges on my
mountain.

You can buy and find more information on Procreate Terrain Putty here

http://www.kraftmark.biz/kraftmark.terrain.html

The completed mountain can be seen here

http://senjistudios.com/?p=1066