Sentinel X100 Central Heating Scale Inhibitor 1Ltr Product Code: 79683

General purpose treatment for total protection against scale and corrosion. For use in all types of indirect central heating systems, including those containing aluminium. Non-acidic.


  • 1 Year Guarantee
  • Ensures Optimum Boiler Efficiency
  • Protects against Pin-Holing
  • Non-Staining, Colourless Formulation
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Safety Data Sheet
Additional Information
Technical Specification
  • Brand : Sentinel
  • Sealant Adhesive Volume : 1 Ltr
  • Product Type : Central Heating Scale Inhibitor
  • Volume : 1 Ltr
  • Model No : X100
  • 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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€17.45 Incl. 20% VAT

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Sentinel X100 Central Heating Scale Inhibitor 1Ltr is rated 4.8 out of 5 by 257.
Rated 5 out of 5 by from X100 This is the best scale inhibitor on the market, easy to install and works all year round. Improves the boiler and radiator performance and therefore pays for itself. You should replace it annually, drain your radiators and then install.
Date published: 2019-06-30
Rated 5 out of 5 by from Top quality product Easy to use just added directly to my heating system using the towel rack and a funnel. don't try to direct pour it unless you want to spill it.
Date published: 2019-06-19
Rated 5 out of 5 by from Recommended and Essential I had the CH relief valve replaced by a Gas Safe engineer. The upstairs radiators had to be drained so I added a full bottle to radiator upstairs after fix. The Engineer checked and we re-pressured the system. Sentinel X100 is a very important additive for protecting ones CH Boiler and System. Highly recommended. System appears to performing much better now then before the fault occurred.
Date published: 2019-05-23
Rated 5 out of 5 by from Have been using it for years Having using this for years with no problems. Drained and flushed the system this weekend and refilled with this.
Date published: 2019-04-08
Rated 5 out of 5 by from Inhibitor .. what can i say? fitted new radiator and topped up system with Sentinel 'Inhibitor' and Sentinel 'Leak Seal'. Sentinel products seem, in my experience, to do the job and are comparitively cost effective.
Date published: 2019-03-14
Rated 5 out of 5 by from Inhibitor I always add inhibitor to my system after being drained.
Date published: 2019-03-05
Rated 4 out of 5 by from Trouble free solution Used this product for a number of years. Never had any problems with corrosion, sludge build up or sticking valves.
Date published: 2019-03-03
Rated 5 out of 5 by from Necessary for Optimal Performa I recently had a leak due to the much-suffered picture hanging/screw through the pipe scenario. One day they will invent a plastic pipe detector. After draining the system and repairing the pipe, I did not hesitate to use Sentinel X100 Inhibitor to keep my heating system in optimum condition when re-priming.
Date published: 2019-03-03
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