Fernox F1 Central Heating Protector 500ml Product Code: 77218

Provides long term protection of domestic central heating systems against internal corrosion, limescale formation and bacterial contamination. Prevents corrosion of all metals. Use on all types of boilers, radiators and pipework systems. Non-toxic.


  • 1 Year Guarantee
  • Stops Frequent Venting of Radiators
  • Prevents Bacterial Contamination


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Safety Data Sheet
Additional Information
Technical Specification
  • Brand : Fernox
  • Sealant Adhesive Volume : 500 ml
  • Product Type : Central Heating Protector
  • Volume : 500 ml
  • Model No : F1
  • Pack Size : 1
  • Manufacturer Guarantee : 1 Year Guarantee
  • Pieces in Pack/Case : 1
Product Contents
Delivery & Returns


Standard delivery: €15

Free delivery on all orders over €70.00

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Hopefully you won't need to return an item, however, if you do, it is our aim to make this as simple as possible. By following the guidance below you can help us to help you when a product is not what you expected, or is faulty. Your statutory rights are not affected by this guidance.


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€22.95 Incl. 20% VAT

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Fernox F1 Central Heating Protector 500ml is rated 4.8 out of 5 by 12.
Rated 5 out of 5 by from I wouldn't use anything else Last year I flushed my system using F3. I then refilled it and used F1. Just recently I needed to change a large radiator for a smaller one in the kitchen. Due to kitchen refurbishment nothing to do with problems with the heating system. On draining the system I was amazed to find that the water coming out of the drain tap was all but clear. So guess what I put back in? I wouldn't use anything else. Also it's guaranteed for 10 years, what more could you want.
Date published: 2014-09-20
Rated 5 out of 5 by from inhibitor does what it says on the bottle ease of use, well packaged
Date published: 2014-07-01
Rated 5 out of 5 by from best brand got the best as its on offer needed enough bottles to do 500 litre thermal store so price was an issue 5 stars all round
Date published: 2014-06-08
Rated 4 out of 5 by from good very good started using it last year about to renew it this year
Date published: 2014-06-07
Rated 5 out of 5 by from Fernox Central Heating Protect Does what it says, use this in my buy to let properties and never had any problems with it. The value and features? are average, there are other cheaper products that reportedly do the same job.
Date published: 2014-06-06
Rated 4 out of 5 by from fernox cental heating protect Grear value. Bought on deal of the day. Read the reviews. The description does not tell of the amount of radiators it will treat, the answer is up to ten. If as above that as i do you will need two bottles. The assistant at screwfix was very helpful to aquire that info. for me. What a great team.
Date published: 2014-06-06
Rated 5 out of 5 by from The Best Heating Treatment Specified Fernox products for many years. Using Fernox F1 Protector always provides confidence to maintain a clean heating system.
Date published: 2013-02-26
Rated 5 out of 5 by from The BEST Inhibitor Improves reliapility, performance and eficiency of your central heating system, why would you not add this to your system, especially for a new boiler/radiators.
Date published: 2012-11-04
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