USG Ultimate Drystone™ Casting Media is a unique product that requires no oven drying - you can cast, paint, package and ship in one day. USG Ultimate Drystone Casting Media offers excellent duplication of fine detail, high compressive strength and a high density that provides a quality feel. Ideal for solid cast pieces, USG Ultimate Drystone Casting Media is formulated to increase chip resistance and is an excellent alternative to polyester resin.