Experience the benefits of a clean and efficient central heating system with Sentinel X400 High Performance Central Heating Cleaner. This 1L solution is specifically designed to protect your boiler or radiator from the inside out, ensuring a long-lasting and hassle-free performance. Suitable for use with all types of central heating systems, Sentinel X400 is the trusted choice for maintaining your heating health. The unique formulation helps to prevent scale build-up and corrosion, ensuring your system operates at its best while helping to prolong the life of your heating appliance.