BOTZ GmbH is a leading manufacturer of ceramic glazes and related products. The company was founded jointly as Surmann und Klück GbR by Mechthild Surmann and Jürgen Klück in 1984. Their basic concept was to develop and manufacture exclusively lead-free and cadmium-free brush-on glazes (later fully "non-toxic"). Today they offer a vast selection of high quality non-toxic glazes in a ready-to-use format. Products showing a square tile are low-temperature/earthenware glazes and those showing a triangular tile are stoneware glazes.