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Krystal Internal Membrane™ (KIM®) is a hydrophillic crystalline waterproofing admixture in dry powdered form, effective in creatingwaterproof concrete. KIM is the STANDARD used for qualifying Permeability Reducing Admixture - Hydrostatic Conditions asspecified by 'ACI 212' (Highest Grade of Permeability Reducing Admixture). KIM is used in place of externally applied surfacemembranes to protect against moisture transmission, chemical attack, corrosion of reinforcing steel and enhances durability of thestructure.KIM admixture consists of portland cement, quartz, sand and propriety chemicals, but does not contain sterates and sodium-silicates.When combined with fresh concrete, Kryton's unique and proven Krystal® technology reacts with un-hydrated cement particles andmoisture to form millions of needle-shaped crystals. These crystals grow in a catalytic reaction, filling the naturally occurring pores andvoids in concrete, and permanently blocking the pathways for water and waterborne contaminants. Later, if cracks form due to settlingor shrinkage, incoming water triggers the crystallization process and additional crystals form, filling cracks and ensuring that thestructure's waterproofing barrier is maintained and protected.In addition to filling the pores and capillaries of the concrete matrix with crystals, KIM enhances the natural hydration process byintensifying and prolonging the hydration of the cementing materials. This reduces the size and number of capillary pores within theconcrete matrix, making it dramatically less porous, and improving strength and durability characteristics.