Ceramic tile repair
If you only need to seal a crack, jump to the section on sealing tiles. Before you get started, gather your tools. You will need a hammer and chisel, safety goggles, gloves, a long-sleeved shirt, and a brush or a broom to sweep up excess residue as you work and afterwards.
Remove grout around the tile using a hammer and chisel. Wear safety goggles, gloves, and a long-sleeved shirt to keep yourself free of dust and residue.
Remove the tile. Depending on how accessible your tile is, you may need to break it (use a drill, hammer, and chisel) and insert a new one. You can try to preserve the tile by freeing it as follows: wedge your chisel under a corner and carefully use the hammer to pry the tile away. Repeat the process at the other corners and along accessible sides; focusing on one area can cause cracks.