Puly Descaler Espresso® is a powdered descaler designed for cleaning boilers, heat exchangers, heating elements, kettles, filter coffee machines, and all coffee extraction machines. Even a thin layer of limescale measuring just 0.3 millimeters has an insulating effect, lowering the temperature by approximately 5 degrees. This forces the machine to work harder to reach the desired heat, often resulting in under-extracted coffee in the cup. Puly Descaler Espresso® complies with HACCP regulations. It acts even in cold water and it works best also on parts not subject to heating, such as trays and tanks of home and professional machines not connected to the water supply. Not suitable for use with aluminum materials.