This product is a waterproof concrete admixture specifically designed to seal pores and heal cracks. Krystaline Add Plus 2.5 is a powder form admixture that is added to fresh concrete, utilizing C-S-H (Calcium Silicate Hydrate) technology. The catalyst within the admixture reacts with lime and water present in the concrete, resulting in the formation of C-S-H gels and crystals. These gels and crystals effectively fill up the capillary network and hairline cracks, creating a barrier that prevents water penetration.