Sandtastik® Modeling Clay is premium quality, natural, self-hardening clay. Its exceptional plasticity and ultra fine grade allows for excellent detail versatility. Air cures to superior strength and durability. It will not crumble and has minimal shrinkage. It can be carved, sanded, and drilled when dry and accepts virtually any finish. If desired, Sandtastik® Modeling Clay can be kiln fired. Sandtastik® Modeling Clay is ready to use right out of the package and is suitable for all hand building methods.