Sedlecký kaolin a. s. is engaged in mining and processing of kaolin namely for porcelain industry, sanitary ceramics, ceramic tiles, refractories, chemistry and further application. The most renowned kaolin trade mark is Zettlitz Ia, the integral part of porcelain bodies in Europe.
The wide assortment of Sedlecký kaolin a. s. and of its subsidiary companies includes milled and processed clays, natural sandstone, stoneware and sanitary ceramics. The growing segment of building materials includes such products as wet plasters Kerastuk.
There is prosperous production of litter for cats and pets, especially the brand Kitty Star.