Koster Repair Mortar NC 25kg

Koster Repair Mortar NC is a repair mortar and plaster with excellent workability. It has a high adhesion to old and new mineral building material substrates. Repair Mortar NC is characterised by high chemical and mechanical resistance and compressive strength. It is fibre reinforced. It is ideally suited as substrate preparation for corrosion protection with Koster PSM or Koster Silicate Mortar, for example in industrial chimneys, sewer systems, or other concrete structures which are exposed to low pH environments.

Fields of Application

Repair Mortar NC can be used for structurally relevant repair and touch up of voids, and for levelling of concrete defects. The material is especially suited as a repair mortar for use in structural members which are exposed to exceptional chemical and mechanical stresses such as for example in agricultural construction, chimneys with corrosive flue gas conditions, or wastewater applications, as well as other construction elements like foundations, towers and bridges, among others.

Substrate

The surface has to be sound and solid, free of oil and grease, free of formwork separating agents, residual adhesions and cement residue. The material can be applied to all concrete substrates. The pull off strength of the substrate must have a minimum of 1.5 N / mm². Directly before the application, pre-wet the substrate so that it is matt moist. Avoid standing water. Absorptive and salt contaminated substrates are to be primed with approximately 200 g/m² of Koster Polysil TG 500.

When installing mortars substrate preparation is of vital importance. Pre-wet all mineral substrates before the installation of KÖSTER Repair Mortar NC. The surface near pore structure must be saturated, (avoiding standing water and puddles) so that it does not absorb water from the applied mortar.

Consumption

Approx. 1.9 kg/l void as repair mortar; approx. 19 kg/m²; per cm of layer thickness of the plaster