Sealers… What products actually need to be sealed and what doesn’t?
First of all, man-made tiles do not need to be sealed. This would include ceramic, porcelain, glass or metal tiles. What does need to be sealed is all natural stones, such as slate. travertine, limestone or marble. There is another product called “enhancer,’ that actually enriches the stone color and seals the natural stone as well.
Don’t forget the grout. Typically grout need to be sealed, unless it is epoxy or urethane.