The PU-foam cleaner is a mixture of organic solvents and a propulsion gas ensuring good solubility of both the input components and the partly hardened polyurethane foam. The product in an aerosol package is designed for cleaning and maintenance of application guns and surfaces stained with polyurethane foam. After application of the spray adapter the PU-foam cleaner can be used to clean surfaces and other items stained with polyurethane foam that has not hardened yet. The PU-foam cleaner is an excellent agent for cleaning of the inside of application guns. Proper cleaning of the application gun optimises its functionality and extends its service life.