Skip to product information
1 of 1


Fernox F1 Protector 500ml

Fernox F1 Protector 500ml

Regular price £10.95 GBP
Regular price Sale price £10.95 GBP
Sale Sold out

Protector F1 is the market leading inhibitor which protects against corrosion and limescale formation in domestic central heating systems.

Available in 500ml liquid bottle and 265ml Express aerosol canister (express available HERE) 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.

  • Protects against corrosion and scale in mixed metal central heating system.
  • When used in conjunction with Cleaner F3 gas savings of up to 15% can be achieved every time you heat your room
  • Stops frequent venting of radiators
  • Prevents sticking pumps and boiler noise
  • Reduces maintenance costs and saves on fuel bills
  • Prevents cold spots in radiators
  • Non toxic, environmentally friendly

Application and Dosage
The recommended ‘in use’ concentration of the product is 0.5%. One 500ml bottle will treat an average 3 to 4 bedroom house (100 litres). For open vented systems add via the feed and expansion tank. For sealed systems add via the radiator using a Fernox Injector. In single feed indirect cylinders, e.g. “Primatic” or similar, potable water chemicals must be used. For continued protection Fernox Protector F1 levels should be checked regularly (annually). We recommend untreated or sludged systems are thoroughly cleansed and flushed in accordance with BS7593 and Benchmark using Fernox Cleaner F3/F5, before treating with Fernox Protector F1, as existing debris can damage the installation.

Physical Properties
Protector F1 is a blend of inorganic and organic corrosion and scale inhibitors and biocide.
Form: Liquid
Odour: Aromatic (slight)
Colour: Light Yellow
pH (conc.): 8.0
pH (soln.): 7.4 to 8.2
SG: 1.1 at 20°C

Packaging, Handling and Storage
Fernox F1 is supplied in 500ml bottles. 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.

View full details