The results of research on the production of ceramic composites based on extremely desalinated masses are presented. Compositions of types of fireclay were chosen as objects of research, which performed the func-tion of reinforcement, and liquid glass - the function of binder - matrix. Composite samples were produced by semi-dry pressing followed by structural strengthening - firing in long-term and high-speed modes. The work methodology included a set of methods of chemical and X-ray analysis of silicate materials and standardized testing of ceramics and composites. Features of the chemical and phase composition of fireclay varieties and their characteristics during firing are shown. The effectiveness of using the composition of fireclay varieties to regulate physical and mechanical parameters, including the minimization of shrinkage as a factor in the de-formation flow of products, has been established.