Tenax Proseal Premium Granite Sealer, Marble Sealer & Natural Stone Sealer - 1 Quart (32 oz) for Countertops, Floors & Outdoor Surfaces - Water-Based Protection for Kitchen, Bathroom & Patio

This product has a strong odor, that smells like nail polish. However, it works incredibly well and was super easy to apply. I tested it on my nightstand before deciding to use it on my new marble kitchen countertops. I just thoroughly cleaned the dust off my old marble nightstand top and made sure it fully dried. I, then, applied the Proseal with a small piece of lint-free rag and a gloved hand, just by lightly rubbing on a good amount. I went over it twice. The next day I tested my surface with a drop of oil, in an inconspicuous spot, and the oil just beaded up on top without any penetration into the marble, at all, even with leaving it there overnight! No more worrying about oil or wine stains!After it dries it does leave the surface slightly dollar, but this buffs out with a clean cloth.I have used other marble sealers in the past for my bathroom marble tiles. This one is considerably easier to apply than the Bulletproof sealer I used before, because you don't have to keep going over the same tile to keep it wet for 15 minutes like the other one, which was very time consuming with doing 60 ft. However, the sealer does have a much stronger odor than the Bulletproof sealer, just fyi. I made sure I had an open window with a fan blowing out. Also with the bulletproof sealer I could still get oil penetration.As with any sealer, it should be replied every 6 months to a year, depending on how much use the surface gets.