Chemical reistant bricks & tiles are utilized for floorings subject, Mansory constructions to acid attack, Lining of chambers and towers in lining of, Chemical plants sewers carrying industrial effulents, Etc, To prevent deterioration of the surface by acids except hydrofluric acid and such as, Percholic acid clay or shale of suitable composition with low lime and iron contents, Felspar, Flint and vitrified, Or sand at high tempertaure in ceramic kilns. These ceramic and masonry materials are designed primarily intended for utilization in chemical and associated sectors industries and commonly utilized in conjunction with chemical substances resistant mortars.