HIDROPLAST is one-component waterproofing, flexible sealing under tiles. HIDROPLAST can be used on all types of substrates, such as gypsum board walls, gypsum and cementous renders, light-weight concrete blocks, wood, cementous and anhydrite substrates, wood substrates. A waterproofer for bathroom and shower walls and floors before installing ceramic tiles and natural stone; waterproofing for kitchen floors and walls and countertops before installing ceramic tiles, including floor heating.