Stihl Varioclean is a cleaning solution which contains NO phosphates or organic solvents and is designed to remove oils, resin, sap, grass stains and other dirt and grease from garden machinery. This will include everything from chainsaw chains and bars, circular saw blades and the housing of your machinery. Surfactants are completely biodegradable. For diecast magnesium and steel. To use, apply the cleaner, wash off with water and use a cloth to rub dry. Always use PPE when using cleaning substances.