Sentinel X200 Boiler Descaler 1Ltr Product Code: 43140

1Ltr. A unique, life-long system treatment for the elimination of limescale and boiler noise. Reduces fuel usage. Safe to use in all types of indirect central heating systems. Non-acidic.


  • Restores Boiler Efficiency
  • Eliminates Kettling
  • No Need to Flush - Stays in System
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Safety Data Sheet
Additional Information
Technical Specification
  • Brand : Sentinel
  • Product Type : Boiler Descaler
  • Volume : 1 Ltr
  • Model No : X200
  • 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.


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€25.45 Incl. 20% VAT

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Sentinel X200 Boiler Descaler 1Ltr is rated 4.3 out of 5 by 6.
Rated 5 out of 5 by from Sentinel X200 Quality product used on its own with a power flush or added to the system with X100, brings a scaled/blocked boiler back to life ( unless the boiler is beyond repair), I personally wont use any other product.
Date published: 2014-05-17
Rated 4 out of 5 by from ok but The product is ok but you need to be patient as it take a few weeks to work found the rapid dose to be easier to use.
Date published: 2013-04-01
Rated 4 out of 5 by from Sentinel X200 This stuff works well. I put 2 litres in a 13 radiator system. But I have found it needs another dose after 2 or 3 years. I have an open system.
Date published: 2013-03-09
Rated 5 out of 5 by from Easy and safe It is not as quick as the acid cleaners, but is much easier and safer to use. I have had damage to skin and clothes from spillages of acids, and you have to rinse and flush them out very thoroughly. X200 is mild and seems harmless, and you don't have to drain it out or rinse it - you leave it circulating in the system permanently. It works faster if you add it in summer when the radiators are all turned off, then it is more concentrated in the boiler HEX and hot-water system because it does not mix with all the water in the radiators. It may take a month or two to achieve its best You may need two bottles if the system is very large or scaly.
Date published: 2012-12-18
Rated 4 out of 5 by from Dead Easy to administer I found this very easy to add into the heating system - Drain an amount of water from the system whilst isolating the header tank then add to the header tank and refill the system. So far it appears to be working well.
Date published: 2012-06-25
Rated 4 out of 5 by from best noise reducer used this product 5 or six times its always worked at reducing kettling noise in old boilers
Date published: 2011-03-30
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