Simple Steps to Apply Sealer Clean tile and grout thoroughly. Ensure tile and grout are completely dry. Mask off any areas you do not want to get sealer on. Liberally apply a quality fluorochemical-based sealer to unglazed tile and non-epoxy grout. Click to see full answer. Consequently, how do you seal tiles? Basic Steps To Sealing Tiles Clean the entire tiled area prior to sealing. Apply the first coat of the sealant (if required). Grout the tiles and leave to cure properly (check the manufacturer’s advice for how long to leave the grout for). Apply the final coat of sealant ensuring it is spread evenly – leave to dry. Likewise, can ceramic tiles be sealed? The surface of most ceramic and porcelain tile does not need to be sealed, although some require a light application of a penetrating sealer to fill the micro pores on the surface of the tile. However, the grout joint between the tiles is usually very porous and generally made of a cement-based material. Regarding this, what is the best sealer for ceramic tile? Stonetech’s Heavy Duty Sealer is an excellent sealer for the stone. It is an impregnating sealer and will also seal the grout for ceramic tile. Unitex’s Reflection, Betco Sure Cure, or Stonetech Grout Sealer can also be used for sealing the grout on glazed ceramic or the entire floor surface for unglazed ceramic tile.Do I need 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. If your tile is stone (slate, marble, granite, travertine, etc.) then it will need to be sealed.