Kryton International’s Krystol Mortar Admixture transforms rendering mortars, usually applied to exterior building surfaces as finishes, into waterproof protection. When added to concrete mixes in brick and block construction, Krystol reacts to form millions of tiny needlelike crystals that block capillary pores and cracks. In the past, brick construction required surface-applied sealant for waterproofing, which was temporarily effective but chipped and flaked as a building aged—this admixture eliminates the need for those sealants.