DOT-approved concrete sealer Ghostshield Siloxa-Tek 8500 is designed to reduce water and moisture intrusion. Through nanotechnology, the sealer penetrates surface pores and capillaries and changes the surface tension of the mineral substrate to which it is applied. A water-repellent barrier is formed, keeping water and aggressive water-soluble salts, chlorides, and sulfates out. It does not significantly modify the substrate’s appearance or traction. KreteTek