Sculptamold works like papier mache. It has a unique modeling ability and clings to virtually any surface without shrinking. Makes an excellent material for building up sculptures formed on armatures. Fantastic for modeling because it sets up like plaster and is completely hard in 30 minutes. Prepare quickly by adding water. Finished pieces are lightweight and durable. May be carved, sanded or sawed. 3 lbs. makes approximately 141-3/4 cubic inches. Gluten-free. 25 lb. package; does not qualify for free shipping. AP Seal, non-toxic.