Krystol T1 & T2 Waterproofing System is a cementitious, brush-applied, treatment for concrete. Krystol T1 & T2 contain the proven world-renowned Krystol® waterproofing chemicals. Krystol T1 is applied to the concrete first followed by Krystol T2. When applied in accordance with manufacturers specifications, the Krystol® system is warranted for use in place of conventional waterproofing systems. Krystol T1 & T2 react chemically within the concrete mass to form billions of needle-like crystals which block the pores, voids and microcracks in concrete. Presaturation and subsequent re-wetting of the surface will cause deeper diffusion of the organic chemicals and formation of crystals at greater depth.