Self hardening artist clay for school, home, arts and crafts, no firing needed. Safe, multi-purpose and economical. Just like other high quality Laguna stoneware clays, Dry-Hard clays are great for modeling, throwing, sculpting and thousands of hobby projects. The cure for shrinking school budgets, Dry-Hard’s self-hardening formula saves the hassle and expense of kiln firing, while producing a finished product which dries leather hard in 24 hours and rock hard within several days (actual drying time varies with temperature, humidity and thickness of clay). Decorate with acrylic paints. Must be sealed with a commercial water sealant to waterproof or for gloss finish use one of our spray glazes over the acrylic paints.. Not for use with food or water. Ornamental only. We carry the acrylic paints, gloss, matte and porcelain sealers in our acrylic paints section.