Create a chalkboard on virtually any surface. Formulated with extremely hard pigments to out perform the competition-will not leave scratch marks where the chalk was used. Converts wood, metal, plastic, glass, paperboard, and hardboard into a usable chalkboard. Great for kids projects, functional uses-even resurfacing ping-pong tables. Erasable finish inspires creativity. Dries to touch in just 30 minutes. Allow 3 days before writing on the finish. Apply when temperature is between 50 deg. F. and 90 deg. F. Child-safe, nontoxic when dry.