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Ceresit waterproofing slurries with Hydroslide Effect create an immediate water-repellent effect, which prevents deterioration and damage of concrete. The reduced capillary absorption of water makes concrete protection & waterproofing more efficient, allowing to save cost of maintenance and to keep building structures durable and long lasting.
Ceresit slurries with Hydroslide Effect reduce capillary absorption of water thanks to selected hydrophobic agents. This is the reason why our slurries have the property to active repel water maintaining an optimal water vapor permeability. The hydrophobic effect can be measured with the contact angle, which is the angle between the edge of a droplet and a flat surface. .
All cementitious slurries have a capillary pore structure, which is responsible for water absorption. However, the level of capillary absorption is different in rigid and flexible slurries, due to the different performance requirements in specific application fields.
Capillary pore structure of CR 65
Generally, rigid slurries like CR 65 have a wider capillary pores structure vs. flexible slurries.
Due to state-of-art combination of hydrophobic agents, our rigid slurry CR 65 is the best choice.
Flexible slurries like CR 166 have tighter capillary pores structure, thanks to the specific combination of polymers, binders and fillers, which provides very high hydrophobic property. As a result, the more compact constitution ensures the optimal flexibility and crack bridging ability, which make CR 166 the excellent choice in application fields with deformable substrates, where structural movements can cause cracks in the concrete.
Crystalizer slurries like CR 90 have tight pores capillary structure thanks to the increased hydrophobic content and add-on salts, which grow when in contact with water allowing the sealing of hairline cracks.
With a simple spray test you can check whether a waterproofing slurry has a hydrophobic effect.
Preparation
No hydrophobic effect:
Water is soaked in the surface. When observed against the light, the surface appears matt.
CR 65
Hydrophobic effect:
Water is slightly soaked in the surface and drops are sliding, but they are partially absorbed on the way down. When observed against the light, the surface appears matt.
CR 90, CR 166
Strong hydrophobic effect:
Most of the water is not soaked in the surface and drops are sliding down to the bottom. When observed against the light, the surface appears glossy.
Characteristics:
Characteristics:
Characteristics:
Concrete surface features a network of micro-openings like capillaries, pores and cracks, which allows water to be absorbed: on one side, water absorption is necessary to hydration and hardening process; on the other, water is the major transporter of harmful chemicals into the surface, which leads to the dramatic deterioration and damage of concrete.
Capillary absorption of water allows aggressive substances dissolved in water, like chlorids and other salts, to penetrate in the surface, causing the corrosion of steel reinforcements and other structural damages. Wet concrete surfaces are also exposed to organic growth of dirt and mold/mildew, which cause aesthetical and structural damages.
