Fernox Superconcentrate Central Heating Protector F1 gives long term protection of domestic central heating systems against internal corrosion and limescale formation. It prevents corrosion of all metals found in these systems i.e. ferrous metals, copper and copper alloys and aluminium. It is suitable for all types of boiler, radiator and pipework systems. Fernox Superconcentrate Central Heating Protector F1 is compatible with all metals and materials commonly used in central heating systems. Central Heating Protector F1 for mixed-metal domestic central heating systems. Protects against corrosion and limescale. Prevents boiler noise. Stops frequent venting of radiators. Extends system life. Prevents sticking pumps. Saves on fuel bills. Reduces maintenance costs. Maintains system efficiency. Prevents cold spots in radiators. Easily and quickly added via one of the radiators. Ideal for pressurised systems and combination boilers. Universal applicator included. Non toxic, environmentally friendly.