Dirty travertine needs cleaned! Dirt trapped in holes and grout lines leave travertine looking dirty and worn. A proper clean and seal is what this travertine stone floor needed to get its luster back. Pressure washing brings dirt up and out of travertine tiles and grout lines leaving it looking like new. After the floor is clean a sealant is applied. Sealing stone protects the surface of the stone for a longer period time, making it hard for dirt and grime to seep into the stone surface. This floor looks brand new again!