Krystol Internal Membrane (KIM) is a hydrophilic crystalline admixture internationally
known for making exceptionally durable and watertight concrete. KIM contains advanced
Krystol® technology, which drives a catalytic reaction using cement and water to grow a
protective crystalline network throughout the concrete’s pores, capillaries, cracks, and
micro-cracks. Long-term reactivity provides adaptive self-sealing and self-healing
properties that counteract deterioration and allow concrete to maintain its integrity.
KIM is non-toxic and meets all requirements of ACI 212.3R as a Permeability Reducing
Admixture for Hydrostatic Conditions (PRAH).