After your stone has cured you will need to seal it with a penetrating sealer made for marble or grout. You can find this at Lowes or Home Depot in the tile department. Simply rub it into the top and sides of the stone using a cloth. You do not need to seal the bottom as it needs to breath. Sealing your stone will accomplish several things. First, it will keep water from penetrating the stone and then freezing during the winter. Second, it will lock out dirt and help keep your stone cleaner. You will be able to wipe dirt off the stone easier. Third, it can add gloss or enhance the color of the cement if you wish. There are several types of sealer and some are offered in a gloss or semi gloss.
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