Koster Mortar Tight

Koster Mortar Tight is a waterproofing liquid additive which prevents the transmission of water through renders, screeds, and/or sealing slurries. This versatile product improves the density of the mortar structure, making the mortar water repellent (hydrophobic), furthermore, Koster Mortar Tight promotes self-healing of microcracks through crystallization. Koster Mortar Tight increases the impermeability of mortars and slurries against moisture, dampness, hydrostatic pressure and driving rain. Koster Mortar Tight, is free from chlorides and nitrates.