Sculptamold is a dry, white, non-toxic compound that combines the best features of clay, plaster, and papier mache, does not shrink, and is durable for dioramas, 3-D sculptures, model railroad scenery and stage scenery. Sculptamold is AP Non-Toxic. After shaking closed bag to thoroughly blend contents, add water to Sculptamold as directed on bag and begin modeling. Sculptamold sets in 30 minutes, so prepare only as much as can be used in a half hour of modeling time. Sculptamold clings to almost all clean surfaces and can be applied to an armature or any core without fear of cracking. Continue to add Sculptamold by shaping and modeling layers over the armature. Even though it hardens in half an hour, you can continue to work with it as long as you have to, by adding layers of freshly mixed Sculptamold. Each 3 lb. bag of Sculptamold will make 141.75 cubic inches of solid material. Sold as 2 bags for a total of 6 lb. of Sculptamold. Modeling Compound. White. 3 Lbs. Per Bag, 2 Bags. Dry, non-toxic compound. Does not shrink, and is durable for dioramas. Sets in 30 minutes.