Fernox F1 Protector Express Can

Fernox F1 Protector Express Can


Protector F1 is a market leading inhibitor which protects against corrosion and limescale formation in domestic central heating systems. Available in 500ml liquid bottle, 400ml 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.

  • Quick and convenient – doses in 30 seconds
  • Simple to use with no mess
  • Add via a radiator adapter or filling loop supplied
  • Protects against corrosion and limescale
  • Non-toxic, environmentally friendly formulation
  • Maintains system efficiency and extends boiler life
  • Suitable for use with all metals and materials including aluminum

Application and Dosage

One 400ml can will protect an average sized system (130 litres or up to ten single radiators) and is added via a radiator or filling loop. Fernox Protector F1 Express can be dispensed directly into a radiator air vent or system filling loop using the appropriate special adapter supplied with the product. The whole process takes less than two minutes. In single feed indirect cylinder, e.g. 'Primatic' or similar, potable water chemicals must be used. We recommend untreated or sludged systems are thoroughly cleaned and flushed in accordance with BS7593 and Benchmark using Fernox Cleaner F3 Express, before treating with Fernox Protector F1 Express, as existing debris can damage the installation.

Physical Properties

Form: Light brown liquid
Odour: Slightly aromatic
pH (conc): 8.1
pH (soln): 7.0 to 8.0
SG: 1.18 at 20°C/ 68 F°

Packaging, Handling and Storage

Fernox Protector F1 Express is supplied in 400 ml aerosol cans with a universal applicator set. Fernox Protector F1 Express 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 and allergic reaction. Contains 1,2-benzisothiazol-3(2H)-one. In case of contact with eyes or skin, rinse immediately with plenty of water.


Product Sell Sheet
Product Safety Sheet

Product specifications, features and related information is subject to change without notice. We are not responsible for technical or typographical errors or omissions.
Some quantities may be limited. All products once installed, are non-refundable unless caused by a manufacturer's defect.

MFG#: 62436


* Not affiliate with Laars®, Endurance or Heatmaker Companies. We are an authorized distributor of parts for Laars®, Endurance and Heatmaker Boilers and related equipment.
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