Tile adhesive is a type of adhesive that is used to bond tiles to a variety of surfaces. It is a thick, often paste-like material that is applied to the back of the tile and the surface to which it will be attached. The adhesive is then allowed to dry, creating a strong bond that holds the tile in place. Tile adhesive is commonly used in the installation of floor and wall tiles, as well as on other surfaces such as countertops and backsplashes. It is available in a variety of types and formulas, depending on the type of tile and surface being bonded.