Internal crystallization

Internal waterproofing crystallization

Complete system technology for waterproofing of concrete by crystallization (IWC).

The foundation of any building is what keeps the whole structure in place transferring dead loads and live loads into the ground. Weakening of the foundation is probably one of the most devastating things that can happen to a building next to fire or an earthquake.

When crystalline waterproofing is applied to the concrete surface, either as a coating or as a dry-shake application to a fresh concrete slab, a process called chemical diffusion takes place. The theory behind diffusion is that a solution of high density will migrate through a solution of lower density until the two equalize.

Thus, when concrete is saturated with water prior to applying crystalline waterproofing, a solution of low chemical density is also being applied. When crystalline waterproofing is applied to the concrete, a solution of high chemical density is created at the surface, triggering the process of chemical diffusion. The crystalline waterproofing chemicals must migrate through the water (the solution of low density) until the two solutions equalize.


Instead of reducing the porosity of concrete, like water reducers, plasticizers, and super plasticizers, the crystalline formation engages the material filling and plugging the voids in concrete to become an integral and permanent part of the structure.

Because these crystalline formations are within the concrete and are not exposed at the surface, they cannot be punctured or otherwise damaged like membranes or surface coatings.

Crystalline waterproofing also offers protection against the effects of CO, CO2, SO2 and NO2, the gasses responsible for the corrosive phenomenon known as ‘carbonation’.

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