Dr. Wall Care Stone Sealer is a siloxane penetrating sealer designed specifically for the treatment of Natural Stone surfaces. Sealer protects Natural Stone surfaces from exterior exposure and weathering. It is specially formulated sealer which penetrates deep into the surface pores, reacts chemically to provide a durable and long lasting barrier against water and salt intrusion. This level of protection can substantially reduce the damaging effects of freeze/thaw cycling, precipitation, acid rain, efflorescence and dust/dirt degradations.