E-Z Patch 23 100% Silicone Rubber is the flexible formula for ceramic tile adhesion, ceramic tile grout and other sealant uses. It has little odor, is UV stable, mildew resistant, and non-corrosive. E-Z Patch 23 provides excellent bonding to cured masonry surfaces, ceramic tile, fiberglass, acrylic, wood, fiber optics, ABS and glass. This is the best product for tile and grout repairs. Full cure time is approximately 24 hours, but swimming can continue immediately and pool water can be refilled after 1 hour.