The document describes a crystalline waterproofing system that can seal cracks and gaps in concrete structures to prevent water penetration. A cementitious crystalline waterproofing compound is made into a thin slurry and applied to joints and gaps between tiles. When water is added, the chemical enters the pores and crystallizes to fill all gaps. This integrated waterproofing system protects against leaks and prevents water damage without needing additional surface coatings. It can be used for structures like swimming pools, basements, and concrete walls.