Coating mortar for water treatment and sewage treatment plants, tunnels, canals and civil engineering structures. Filling breakouts and holes in screeds, concrete ceilings, supports and balcony slabs. Waterproof up to 5 m water column, from 10 mm layer thickness with water pressing from the inside. Corresponds to stress class M3 according to the repair guidelines. Corresponds to din 19573. Waterproof, weatherproof and frost-resistant, universally usable indoors and outdoors. Suitable for exposure classes X0, XC1-4, XD1-3, XS1-3, XF1-4, XA1-2 and XM1, as described in EN 206 and din 1045-2. Permanently resistant to strong chemical attacks in exposure class XWW3, according to din 19573. Meets the requirements of the guidelines for maintaining the value of accessible canals from the ci.