RainGuard Salt Guard is a penetrating water repellent and salt intrusion inhibitor that dries down to an invisible clear finish. It helps to prevent damage from de-icers, road salts, and ocean salt spray. Formulated to penetrate the surface to prevent moisture from absorbing into the surface and causing freeze/thaw damage including cracking, spalling, and corrosion. Salt Guard does not create a film or change surface appearance. Ideal for porous unpainted, horizontal/vertical, interior/exterior, concrete, masonry, and wood surfaces such as: driveways, garage floors, patios, walkways, fences, decks, areas surrounding salt water pools, and any other surface subject to salt and freeze/thaw damage.