When to Seal Tiles. Sealing is done to strengthen tile or grout's defenses against dirt, spills, and erosion of grout, but not all tile needs to be sealed. If your tile is ceramic or porcelain, it probably won't need to be sealed. There are some exceptions to this, so check with your manufacturer to be sure.How do you Polish ceramic tile?
Use an electric floor buffer to polish the ceramic tile to a high sheen. No chemical wax or polish is needed. Gently guide the buffer over the floor, working in small 2-foot sections at a time. It is possible to buff the floor by hand with a clean terry cloth towel.