Fernox F1 Central Heating Protector 500ml

Product Code: 77218
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


Download more information
Safety Data Sheet
€22.95 Incl. 20% VAT
Add to Wishlist

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

Click here to see information on our delivery charges and times



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.


Click here to see information on returns and cancellation

More Items to Consider

More Items to Consider

Loading... Loading...
Fernox F1 Central Heating Protector 500ml is rated 4.8 out of 5 by 41.
Rated 5 out of 5 by from Best of Breed A must additive when commissioning a new system or making changes/additions to an existing installation - lives up to it's reputation - could benefit from a 'fill tube' cap to make it easy to insert into radiators through the blank-stop hole without the need to mess around with a home-made funnel !
Date published: 2017-03-02
Rated 4 out of 5 by from Central heating inhibitor Been using it for years seems to work, readily available. Also use it with an antifreeze in case the weather is cold.
Date published: 2017-02-17
Rated 5 out of 5 by from Does what it says Most importantly it is one of the products specifically recommended by the key boiler manufacturers so I use it and it seems to work !
Date published: 2016-12-20
Rated 5 out of 5 by from Best there is Never had any problems with the heating system when using this.
Date published: 2016-12-03
Rated 5 out of 5 by from Excellent product Best inhibitor on the market, very concentrated, will definitely save you some money on your bill.
Date published: 2016-11-21
Rated 5 out of 5 by from Always does the job One of the few products you don't have to search around making comparisons. Just pay the best price you can get and this product won't fail you. Fortunately Screwfix often offer the best price so with their Click&Collect you can't go wrong.
Date published: 2016-11-12
Rated 5 out of 5 by from Excellent Stuff I've always used this stuff and it seems to work well - limiting scum in the system. I'm renovating a house - slowly - and use this on a regular basis as I have to drain and then top up the system after doing each room. Screwfix prices are normally pretty good so I add it onto the order - along with one of their radiators and a nice shiny Drayton TRV4
Date published: 2015-12-11
Rated 4 out of 5 by from The best ! -but why don't Fernox fit a cap that a tube can be affixed as presently it is difficult to pour into a radiator. It would then be a 5* product with even higher sales.
Date published: 2015-12-02
  • y_2017, m_4, d_23, h_23
  • bvseo_bulk, prod_bvrr, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_41
  • loc_en_GB, sid_77218, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_screwfix-ie