Oatey® Silicone Sealant is a one-part, mildew-resistant sealant for ceramic tile, showers, tubs, rimless sinks and plumbing fixtures. Bonds to porcelain, ceramic, marble, fiberglass, and most metals and remains permanently elastic and is safe for use on plastic including ABS. Recognized by USDA for use in meat & poultry plants once fully cured. High performance sealing. Available in clear and white sealants. Oatey products have earned the trust of plumbing professionals for over 100 years.