Oatey Tub-N-Tile Caulk is a flexible, acrylic latex general purpose sealant recommended for caulking bathtubs, sinks, showers and lavatories. Tub-N-Tile Caulk can also be used on most common building products such as concrete, metal, wood, marble, glass and brick. Tub-N-Tile Caulk is mold and mildew resistant.