Protector F1 is a market leading inhibitor which protects against corrosion and limescale formation in domestic central heating systems. Available in 500ml liquid bottle, 265ml Express aerosol canister and 290ml gel cartridge formats. Protector F1 is suitable for use with all metals and materials commonly used in heating systems. For long-term protection ensure concentration levels are maintained and checked annually as part of the boiler or system service. Protector F1 is compatible with all other Fernox products.

  • Central Heating Protector for mixed-metal domestic systems
  • Protects against corrosion, limescale and boiler noise
  • Stops frequent venting of radiators
  • Extends system life and prevents sticking pumps
  • Reduces maintenance costs
  • Maintains system efficiency
  • Easily and quickly added via one of the radiators
  • Universal applicator included
  • Non-toxic, environmentally friendly

Application and Dosage

One pack (290ml) is sufficient to treat a typical central heating system (100 litres or up to ten single radiators) and is added via one of the radiators. Too much treatment will not cause problems and is preferable to insufficient dosing. A standard mastic gun is used to dose Fernox Superconcentrate Protector F1 directly into a radiator air-vent using the special adapter supplied with the product. The entire process can be completed in less than five minutes. For long term protection against corrosion and limescale we recommend systems are cleaned using an appropriate Fernox Cleaner F3 and then protected with a Fernox Protector F1. In single feed indirect cylinders, e.g. 'Primatic' or similar, potable water chemicals must be used.

Physical Properties
Colour: Pale beige
Form: Viscous liquid
Odour: Faint
pH: 7.0
SG: 1.23 @ 20°C

Packaging, Handling and Storage

Fernox Protector F1 is supplied as a 290 ml cartridges with a universal applicator set. Fernox Protector F1 is classified as non-hazardous, but as with all chemicals: Keep out of reach of children. Do not mix with other chemicals. Do not take internally. May produce an allergic reaction. Contains 1,2-benzisothiazol-3(2H)-one. In case of contact with eyes or skin, rinse immediately with plenty of water.


Please contact the supplier to check availability of stock