SURE STEP is a long-lasting chemical treatment that creates an invisible, sophisticated tread design into the surface of hard mineral floors and porcelain/enamel bathtubs. SURE STEP will not change the appearance of the floor or bathtub. Our product has been developed and proven for concrete, quarry tile, Spanish tile, ceramic tile, glazed brick, marble, terrazzo, porcelain/enamel, and many other hard mineral surfaces.