1 L special concentrate for cleaning all treated and untreated wood and WPC/BPC surfaces outdoors. Cleans and removes grayness depending on the application while being gentle on the material. The concentrate is sufficient for over 50 m² of surface area and is, of course, biodegradable. It is best applied with a foam sprayer, and the surface should be cleaned with a surface brush such as the GLORIA MultiBrush or PowerBrush for optimal results and significantly reduced product usage.