Claycrete is easy to prepare, easy to model and very economical. It comes in powder form and mixes with water to form a paste. When in paste form, it can be modeled or applied over an armature. Claycrete starts setting up in 30 minutes, then detailed modeling can be done. Additions will stick to the form without any problem, because it will cling to any clean surface, but will not stick to hands. Finished projects are very lightweight. Dries exceptionally white when dried at room temperature. Depending on thickness, drying time ranges from a few hours to a few days. For best results, shake the closed bag first to thoroughly blend the ingredients before using. 1 lb. makes approximately 97-1/2 cubic inches. Gluten-free. 20 lb. bag. AP Seal, non-toxic.