Applying a glossy or matte sealant to your ceramic tile not only makes your wall or floor look good, it also helps protect your tile and grout from stains. The most common liquids that threaten to stain your ceramic tile are punch, coffee, grape juice and wine. But you also may get stains from pets, grease, oil or mildew. These all can be costly stains when it comes to cleaning and replacing tiles, so finishing your ceramic tile with a sealant can save you money.
Clean the tile surfaces and grout. Allow the surface to dry for three days before applying a sealant. Any moisture will keep the seal from bonding to the tile.
Choose the sealant finish you want. There are glossy finishes that give your floor a nice sheen. You also can find a sealant that will make your tile look wet without the glossy shine. A matte finish is often chosen by those who like a more natural look. Decide whether you would like a topical or penetrating sealant; the latter offers more protection than a topical sealant.
Put on gloves to protect your hands. Apply a thin coat of sealant using a paintbrush or cloth. Follow the grain of the tile. Allow the tile to dry for two hours.
Apply a second thin coat of sealant. Allow the sealant to dry completely before walking on the tile.