Crystalline & Membrane Waterproofing Systems

Crystalline waterproofing works within the concrete matrix - chemical compounds react with concrete to form insoluble crystals that block capillary pores and micro-cracks. It becomes part of the structure and cannot be mechanically damaged. Membrane waterproofing creates a physical barrier on the concrete surface - it is faster to apply and provides an immediately testable barrier, but requires protection from mechanical damage during backfilling and cannot self-heal. The choice depends on access (positive-side vs negative-side only), concrete quality, water pressure and whether self-healing is required. Our technical team recommends the appropriate system after reviewing project conditions.

Yes - Gemite's negative-pressure waterproofing systems are specifically formulated for interior application where excavation is not feasible. The substrate must be structurally sound: waterproofing cannot compensate for structural defects. For active leaks (water actively flowing through the structure), crack injection or hydraulic leak-plug mortar is performed first to stop the flow, followed by a complete crystalline or cementitious membrane system applied to the interior faces. The technical team designs the full remediation sequence, including injection specification, substrate repair and membrane application.

Crystalline waterproofing can be applied either as a surface-applied slurry brushed onto prepared concrete surfaces, or as an admixture added to fresh concrete during batching. The admixture approach is preferred for new construction as it protects the entire concrete volume - including areas difficult to coat externally. Surface-applied crystalline coatings are used for existing structures and rehabilitation. Both methods achieve penetration depths of 30-100 mm into the concrete matrix, providing protection from within rather than just at the surface.