If you are trying to prevent that wetted look, there's absorbing, penetrating, masonry water repellents that work. Just make sure it's "absorbing" and not some top coat sealer. Make sure it's fully dried out. Sealing brings on problems with limestone, as it can prevent underneath water from evaporating and you can get that black mold that loves pourous Texas limestone, especially noticeable on the white Austin stone, as we call it.