The catalyst is a preparation for removing soot from chimneys and flue pipes. It also improves the efficiency of stoves and boilers. Using the catalyst acts preventively against fires caused by the ignition of soot in flue pipes. The cleaning principle is based on a catalytic reaction that converts deposited soot into carbon dioxide. It is a flameless combustion process at a lower temperature than conventional burning. Recommended dosage for local heaters, fireplace stoves, and boilers for floor heating is 1 sachet; for central heating boilers, 2 sachets. It is not recommended to use a larger dose at once. In case of heavier soiling, repeat the cleaning process. Usage: Throw the sachet onto the glowing fuel and close the heater so that the active substance does not escape into the surroundings. This would reduce the cleaning effect and could cause the release of unpleasant smoke or odour in the room. Package weight is 1 kg.