Leak-proofing mortar HYDROCRYSTAL®

protectivefor concretemineral

Product overview
Hydro-reactive, crystallising mineral mortar/coating with active capillary action and low cement content for the restoration and structural waterproofing of concrete structures subject to negative and positive hydrostatic pressure. By interacting with moisture in the substrate it seals capillary pores and micro-channels, forming a crystalline barrier integrated into the concrete matrix that prevents liquid water ingress while allowing vapour transmission. The coating resists severe chemical attack, direct abrasion and wet-dry cycles, and reduces degradation mechanisms such as carbonation and chloride/salt penetration, extending service life. Designed specifically for waterproofing against counter-pressure.

Advantages

• Active crystallisation – Crystallising technology densifies the capillary network in concrete, preventing liquid water passage while maintaining vapour permeability.
• Resistance to positive and negative hydrostatic pressure – HydroCrystal® develops an integral crystalline barrier within the substrate capable of withstanding both directions of hydrostatic load and local water ingress.
• Structural waterproofing – Thanks to Crystal Core® Technology, HydroCrystal® forms a compact mineral matrix bonded to the substrate, reducing capillary permeability and limiting penetration of aggressive dissolved chemicals (CO₂, chlorides, sulphates) that can corrode reinforcement.
• Wear- and weather-resistant coating – The crystallised layer provides protection against direct abrasion, weathering, UV exposure and repeated wet-dry cycles.

Applications
Restoration and structural waterproofing of concrete elements exposed to positive or negative hydrostatic pressure; waterproofing against counter-pressure; protection of concrete from chemical attack, carbonation and salt penetration.

Powered by
Crystal Core® technology

Characteristics / technical specifications

• Product type: Hydro-reactive, crystallising mineral mortar/coating with active capillary action and low cement content.
• Coverage: 1.6 kg/m² in two coats.
• Technology: Crystal Core®.
• Performance: Forms a crystalline barrier within the substrate matrix (not a surface film), preventing water ingress while allowing vapour transmission.
• Resistance: Resistant to severe chemical attack, direct abrasion, wet-dry cycles, weathering and UV exposure.
• Hydrostatic pressure: Suitable for both negative and positive hydrostatic pressure and counter-pressure applications.
• Standards/classification: Classified as 2 (MC), 6 (RC) and 8 (IR) – EN 1504-2 (C).