Loctite Polyseamseal Tub and Tile Adhesives Caulk is a premium quality, water-based adhesive caulk that provides a water-tight seal around sinks, tubs and other kitchen and bathroom fixtures. Extra mildewcide is added to fight unsightly mold and mildew growth on the cured caulk. The adhesive strength of Tub and Tile makes it ideal for installing back splashes and repairing loose tiles.