Not all types of tiles need sealing. Those made from porous materials such as natural stone, concrete or unglazed ceramic should be sealed to prevent them from absorbing water.Sealing your tiles also helps to improve their durability and makes them easier to clean, so you may wish to choose this for other types of tiles as well. We’re always happy to advise you on sealing tiles, how to maintain them to make sure they look their best, and when you should get them re-sealed.