Multi functional- can be used for bathtub tiles, washbasin, bathroom toilet tiles, balcony sink, porch tiles, corridor tiles and other cracks landscape. Function- suitable for all kind of floor tiles. Provides waterproof function for floor tiles and anti-fungus feature to prevent fungus growing on flooring. Grout to fix and cover all those old and dirty grouting. Features- can accommodate thermal expansion and contraction, no the appearance of hot and cold listed off.How to use.(1)Clean the tile thoroughly and remove the moisture thoroughly and shake it for 20 seconds to prepare for usage(2) Place the inlet of the bottle between the tile gaps and gently press the container to draw along the line between the tiles.(3) Lightly scrape with a sponge to evenly coat the leaves evenly.(4) Dry until tile reform coating is completely firm. (Expecting 2~3 hours depending on environment) You should refrain from cleaning up water for 2 to 3 days, and never use hot water.