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KÖSTER Mortar Tight is an additive for the creation of waterproofing render, screed, or simple sealing slurry on the construction site using sand, cement, and water. KÖSTER Mortar Tight replaces a portion of the mixing water.
It improves the density of the mortar structure, develops water-repellent (hydrophobic) features and promotes the self-healing of micro-cracks through crystallization. As a result, the mortar becomes waterproofing and the capillary absorption capacity is reduced. KÖSTER Mortar Tight can be used indoors and outdoors.
Consumption: For waterproofing basements against pressurized water 1 kg per 10 l water.
