Krystol Internal Membrane (KIM) crystalline admixture offers a waterproofing solution by turning concrete into a water barrier. When combined with water, the chemicals react to form millions of needle-like crystals within the concrete. These crystals grow and fill the capillary pores and micro-cracks, blocking the passage of water. If minor cracks form in the future and water enters, the chemicals reactivate to form new additional crystals to block the water. Kryton International Inc. WOC Booth S11055