Crystalline waterproofing material is a penetrating treatment applied to concrete that permanently seals capillary pores and hairline cracks from within, used on water tanks, basements, swimming pools, and tunnels.

It penetrates the concrete matrix, reacts with moisture and cement particles, and grows crystals that block water pathways permanently. The protection doesn't wear off or delaminate because it becomes part of the concrete itself — and if a micro-crack develops later, the crystalline reaction reactivates in the presence of moisture and reseals it.

ADT Industries stocks crystalline waterproofing materials from Sika, Fosroc, and Dr. Fixit, available across India.