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Sentinel X100 Central Heating Scale Inhibitor 1Ltr (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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£9.99INC VAT (£9.99/Ltr)

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Rated 5 out of 5 by from sentinel 100 Excellent product cheapest at Screwfix. Does exactly what it is intended for
Date published: 2017-04-20
Rated 3 out of 5 by from A Realistic Review I've used this because it seems so popular. But this is a rare product where it seems to me to be virtually impossible to know how good or bad it is. Hence my star rating. So how can so many reviewers say this is a very good product? Or, better or worse than any other inhibitor?
Date published: 2017-04-05
Rated 5 out of 5 by from The best! I only use x100 as it is the best quality and at this price it is the cheapest!
Date published: 2017-04-03
Rated 5 out of 5 by from Market leader Superb quality product from Sentinel - odorless and stainless - couldn't be easier to use - just pour into the system for total peace of mind. Great value as always from Screwfix!
Date published: 2017-03-24
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Is X100 compatible with PE-RT underfloor heating pipe.

Asked by: JBENG
Good morning, The Sentinel X100 Inhibitor is indeed compatible with this type of underfloor heating pipe. Kind regards, Customer Services
Answered by: Sentinel Product Help
Date published: 2017-05-08

Can you add this inhibitor to the system at the same time as noisy boiler additive thanks

Asked by: Earlofh
Hi there, Sentinel X100 can be added with Sentinel X200. For further details please visit the Sentinel website. Kind regards Sentinel Customer Service
Answered by: Sentinel Product Help
Date published: 2017-03-27

Double radiators count as two?

When you say up to 10 radiators does a double radiator count as 2? Thanks
Asked by: Kev12345
Hello there, Yes, we would recommend that you count a double radiator as 2 radiators. Kind regards, Customer Services
Answered by: Sentinel Product Help
Date published: 2017-05-20

Amount needed

Hi, I have 11 radiators and 5 are double, how many bottles should I use? Thanks
Asked by: Kev12345
Hi there, 1 litre of Sentinel X100 Inhibitor is sufficient to treat a typical domestic system of up to 10 radiators. Larger systems should be dosed with twice this amount. Kind regards Sentinel
Answered by: Sentinel Product Help
Date published: 2017-05-16

How many double rads can use it for ?

Asked by: Heywhy
Hi there, Sentinel X100 1L bottle is sufficient for 8-10 radiators. Kind regards Customer Service
Answered by: Sentinel Product Help
Date published: 2017-05-16
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Brand Sentinel
Manufacturer Guarantee 1 Year Guarantee
Model No X100
Pack Size 1
Pieces in Pack/Case 1
Product Type Central Heating Scale Inhibitor
Sealant Adhesive Volume 1 Ltr
Volume 1 Ltr


Safety Data Sheet (COSHH)