ACTIVA-Art Plaster. ArtPlaster is a casting material that creates a super white product that mixes easily; is carveable; paintable and casts (taking exceptional detail). It can be used for rigid molds and features a durable surface. Good for all skill levels; ArtPlaster mixes with water and air dries. This package contains 5lbs/2.27kgs of casting plaster. Non-toxic; easy clean-up. Made in USA.