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Product Details

High Performance Cleaner is specifically designed for cleaning older central heating systems. It is a non-acid treatment which restores circulation to radiators and pipework. Its ruthlessly efficient formula shifts built-up magnetite sludge, eliminating cold spots in radiators and restoring proper heat distribution.

Technical Specification
Brand Sentinel
Safety Data Sheet click here
Volume (L) 0.3
Delivery details
Order value: Under £10 £10 & over
Express usually Next Business Day before 6pm £5 Free
Turbo usually Next Business Day before 12 noon £10 £5
Remote areas standard delivery (2-4 days) £5 Free
Order Value: Under £25 Over £25 but less than £75 £75 & Over
£10 £5 Free


Please note items delivered by our suppliers are not available for the options above. Delivery times may vary.

More about Delivery & Returns
Click & Collect details
If you are using our Click & Collect service please note the following:
  • Order online or over the phone and collect in branch from 5 minutes later.
  • Ensure you check stock is available for collection at your chosen branch.
  • Check branch opening hours to ensure you have sufficient time to collect.
  • For items not available for same day collection, place order before 8pm Mon-Sat (4pm Sun) and you can collect Next Business Day (Mon-Fri) after 3pm.
  • If we have your mobile number, we’ll send you a text when your order is ready to collect.
Reviews
Sentinel X400 Sludge Remover Rapid Dose 300ml is rated 4.9 out of 5 by 7.
Rated 5 out of 5 by from Unblocked my CH Excellent product worked inside 1hr will use again for sure
Date published: 2019-12-06
Rated 5 out of 5 by from Great stuff Great Price Does Exactly what it says
Date published: 2019-12-03
Rated 5 out of 5 by from Easy to apply and quieter already. Easy to apply, good instructions and can be left or removed quickly.
Date published: 2019-11-29
Rated 5 out of 5 by from Good Value £5 cheaper than the competitors....no brainer
Date published: 2019-11-25
Rated 5 out of 5 by from Great product and low price Purchased this product as central heating radiators were not getting hot at the bottom and middle
Date published: 2019-11-14
Rated 4 out of 5 by from Jury out? Jury out on this one? Its been in 4 days and when i drained some water off there was no sign of muck or dirty water so either my system is very clean or it isn't doing anything ?
Date published: 2019-11-04
Rated 5 out of 5 by from Dependable economical product Been using Sentinel products for years. Does exactly as required every time
Date published: 2019-10-28
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