Directions for use: apply the product to the underside and the side of the tiles or panels 24 hours before installation, after which the materials must be dried. The product is strongly alkaline and may damage some surfaces, especially polished ones. Do not use on materials that are sensitive to alkalis. May also alter the appearance of plastic surfaces. For the first time, try on a piece of material that is not needed or on the invisible side of the product. Apply the impregnation evenly with a brush or brush on a dry clean surface. Allow to dry for 24 hours before installing the product. Shelf life 2 years if stored at room temperature, away from heat, moisture and direct sunlight.