---Innovative dual-action formula: The Fernox F9 Protector + Filter Fluid Express 400ml combines both system protection and filtration in one product, providing a comprehensive solution to system maintenance. The unique formula is designed to prevent corrosion and limescale buildup, which helps to improve overall system efficiency. ---Compatibility with all system materials and types: Whether your system utilizes metals, plastics, or composites, the Fernox F9 Protector is designed to be universally compatible. This versatility extends to different system types, including those with mixed metals and those operating under indirect or direct circulation. ---Easy-to-use express dose canister: A key feature of the Fernox F9 Protector + Filter Fluid Express is its convenient 400ml canister.
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