Xypex Admix is a cementitious, dry powder compound containing various active chemicals that take advantage of the inherent porous and chemical characteristics of concrete.  These proprietary chemicals react with moisture and the natural chemical by-products of cement hydration to produce a non-soluble crystalline structure that becomes an integral part of the concrete matrix.  Pores and capillary tracts are blocked, micro-cracks are sealed and the concrete becomes impermeable to water and other liquids.