You can repair cracked porcelain tiles with a porcelain adhesive. First, clean the surface of the tile with rubbing alcohol and let it dry completely. Then, measure and cut the adhesive to size using scissors. Apply the adhesive to the crack and press firmly. Let it dry for 24 hours before walking on it or putting weight on it.

You can repair cracked porcelain tiles by using a epoxy filler specifically designed for repairing ceramic tile. First, use a utility knife to cut away any loose pieces of tile around the crack. Next, clean the surface of the tile with isopropyl alcohol and let it dry completely. Then, apply a coat of the epoxy filler to the crack and smooth it out with a putty knife. Let the filler dry completely, then apply a second coat if necessary. Finally, sand the patch smooth and polish it with fine-grit sandpaper.