I'm a new man! I had been using plaster for terrain for a huge diorama layout. I was tired of hte mess and unsandability, so I tried Joint compound. Of course it cracked, so i tried a thinner, more watery layer. Cracked worse. I was leary of trying Sculptamold, I don't know why. But I tried it. It's everything they say it is. Easy to use, looks like terrain, dries in reasonable time, sandable. Repeat, easy to use. Use it. It's great. Hallelujah, Amen, where's the Tylenol!