Used to replace any type of tile, ceramic or porcelain fixture. Polymermodified for maximum bond strength. This unique product allows you to replace broken tile underwater. No need to drain fountains, pools or spas. Easy to use, cures ultra-fast and develops high early strength for quick installations. Grout in just two hours and traffic in four. Also excellent for quick installation of any stone or tile. Formulated with Controlled Cure Technology, which inhibits warping and staining of moisture-sensitive stone and tile that occurs when installed with traditional thin-set mortars.