Yes, all Fernox internal leak sealers, such as Fernox Leak Sealer F4, are safe for use with combination and other low water content boilers.
They will not block valves or vents. Leak Sealer F4 Express is recommended for all pressurised systems as this can be added in 30 seconds via a radiator, filling loop or Fernox TF1 Filter, without the need to drain the system.
Fernox Protectors are suitable for use on systems of all ages. However, it is advantageous to clean and flush the system with Fernox Cleaner F3 to remove sludge before adding the Protector F1. Alternatively, the universal Fernox Filter Fluid+ Protector can deliver sludge and debris to an existing in-line filter or a newly installed TF1 Filter, whilst protecting the system
Power Cleaner is phosphate, nitrate and nitrate-free and is developed to exceed all regulatory and legislative guidelines in regard to the environment impact of the formulation. It is compatible for use in mixed metal heating systems, including aluminium.
It is an easy to use dip strip that tests central heating systems for the correct concentration of inhibitor, to ensure that the system is fully protected and sludge and debris is prevented from forming and building up.
