A ready-to-use, single-component, semi-liquid compound based on polymer dispersion. After the compound dries, it forms a highly elastic, tight, waterproof coating with good adhesion to the substrate. The waterproofing is intended for waterproofing coatings under ceramic tiles and pavings in interiors with increased humidity: bathrooms, showers, toilets, laundries, cellars, kitchens, dishwashing rooms, vegetable sorting rooms, in catering facilities, etc.