When your floor tiles leave the factory, they have been through a barrage of treatments. In their initial stage as molten clay, aluminum powder may have been added to strengthen the tiles. Next, they may have been treated with a glaze to add a layer of protection and enhance their appearance. From there, your tiles were fired to immensely high temperatures, essentially cooking the tile, and further sealing the glaze. Finally, your tile is treated to a sealer which will protect it, both in transit to your home and then again once it’s set in place in your home.