Used in floor and wall tile as an absorbent, in sanitation, mud drilling, foundry sand bond, iron pelletizing, brick, lightweight aggregate, and cement. It is produced in 40 states. Ball clay is used in floor and wall tiles. Bentonite is used for drilling mud, pet waste absorbent, iron ore pelletizing and foundry sand bond. Kaolin is used for paper coating and filling, refractory products, fiberglass, paint, rubber, and catalyst manufacture. Common clay is used in brick, light aggregate, and cement.