Scalemaster‚ Duo Defense pack contains two physical inhibitors,one to help reduce scale buildup within the boiler, the other to provide protection against corrosion occurring in the heating circuit. Both products act to provide an excellent barrier against the hidden perils affecting a central heating system.

• Contains 2 Physical Inhibitors. One To Help Reduce Scale Build Up In The Boiler, The Other To Provide Protection Against Corrosion In The Heating Circuit.