Porcelain and ceramic tiles are fired in a kiln under high heat to make them hard and often impervious to liquid stains. However, grouted joints between tiles are usually very porous and should be treated with a protective sealer to aid in daily maintenance. Urban Design Floors can properly apply a sealant-protector to grout joints to reduce staining and aid in daily maintenance.
When grout is sealed, liquids tend not penetrate into the grout. The sealer is mostly to protect the absorbent grout, as most porcelain and ceramic tiles do not accept/need the sealer.”