RECESS Crys is a cement based, one-component waterproofing material developed with special chemicals, applied from both negative and positive directions, which doesn't prevent the breathability of the surface, achieve crystallization by penetrating through capillary cracks and forms an inseparable insulating area by integrating with concrete. The mixture produces crystal by reacting with fre e lime particles on the application area and provide water insulation by penetrating through concrete structure deeply. In addition to waterproofing, the product is also used for providing protection against sea water, waste water and diluted chemicals.