Universal concentrated cleaner for all surfaces resistant to acids. Suitable for gentle cleaning of floors, walls, bathtubs, showers, toilets, sinks, taps and other equipment. Instantly removes limescale, salt deposits, rust, urinary stone and other stubborn stains. Gives shine, keeps effect for several days. When used correctly, it does not damage chrome-plated, plastic surfaces, acid-resistant tiles and enamel. Method of application: in a concentrated form the product is used to clean toilet bowls. Daily cleaning: to clean floor and walls dilute the concentrate at the ratio of 5-10 ml per 1L of water; for manual inventory cleaning dilute the concentrate at the ratio of 10-20 ml per 1L of water. General cleaning: to clean tile, glass, granite or remove residues of cement, concrete, rusty stains, limestone, building mixtures and other contaminants dilute the concentrate at the ratio of 100 ml per 1L of water. The concentration of solution depends on contamination degree.