Protect and seal windows doors tubs and tiles with this Dap 08642 9.8 fl. oz. Dow Corning? Black Silicone Sealant. It is waterproof and weatherproof and it will not crack crumble or dry out. It provides a watertight seal around non-porous surfaces such as ceramic tile and plumbing fixtures. This Dap silicone sealant provides long-lasting flexibility and is ideal for indoor and outdoor repairs and home improvement projects.