Alja-Safe Lifecasting Alginate 3 Pound Box | Gypsum Casting KitWorlds first alginate that does not contain crystalline silica (a known carcinogen). Perfect for making single use molds of the face, hands and other body parts Captures detail better than other alginates, giving you a more accurate reproduction of your original Cast plaster, Matrix NEO (polymer modified gypsum) or Smooth Cast 300Q ultra fast urethane resin into the mold to make a reproduction