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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

Covid-19 Update

  • Free Next Business Day delivery for orders over £25 to home and site is available for orders placed before 5pm
  • Saturday and Sunday delivery is now available for orders placed before 4pm on Friday for Saturday delivery and 4pm Saturday for Sunday delivery, see here for details
  • We have temporarily suspended our Pre-12 delivery service
  • Once your order has been dispatched you will receive an invoice email with the courier details and your tracking number
  • Alternatively go to MyAccount, click on your Order History, click on the TRACK icon to link through to the carrier website and the tracking details for your delivery
  • If your order contains more than one item it may be split into two deliveries as we manage volume across our network
  • Due to carrier constraints it is not currently possible to deliver age restricted items. Please use our Click & Collect service for these products
  • Delivery direct from suppliers is now available and specific delivery times will be displayed on the product page
Order Value: Under £25 Over £25 but less than £75 £75 & Over
Next Business Day Delivery (Mon-Fri) usually before 6pm £5 Free Free
Pre-12 Delivery before 12 noon Next Business Day £10 £5 £5
Remote areas standard delivery (2-4 days) £5 Free Free
Saturday Delivery order by 4pm Friday £10 £5 Free
Sunday Delivery order by 4pm Saturday £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

Covid 19 Update

Click & Collect

  • Safe contactless collection is available 7 days a week at our branches
  • Our branches are open 7am-5pm Mon-Sat and 9am-4pm Sun
  • Keeping our colleagues and customers safe and well and respecting stringent social distancing requirements is our number one priority – 2 metre rule enforced
  • Our available product range will not require more than 1 person to lift
  • Please see our guide to click and collect below

  • Please ensure that your mobile number is added so that we can text you when your order is ready to collect

Call & Collect

Due to current trading conditions we have suspended our Call & Collect service until further notice.

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 7pm Mon-Fri (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 4.4 out of 5 by 23.
Rated 4 out of 5 by from sludge remover does what says on the label
Date published: 2020-05-27
Rated 1 out of 5 by from An expensive way to colour water Turned water brown but still plenty of sludge left behind
Date published: 2020-05-15
Rated 5 out of 5 by from great service bought the product on line and i never got the text to collect? 3rd attempt after blocking so im giving false all star reviews im owde £15
Date published: 2020-04-17
Rated 1 out of 5 by from cheeky sods asked me to review my purchase so here it is? i purchased this online to collect? but they were supposed to send me a text for time....(covid ) so after 3 days i email (no response) after 4 days i call and go round the phone merry go round for 5 minutes get dumped and told to email? after 5 days i e mail and no response........in short they got my £15 and i got nothing still waiting ps ordered from ano and two days later there it was but toolstation they still owe me £15
Date published: 2020-04-17
Rated 5 out of 5 by from Standard kit Standard kit standard kit
Date published: 2020-03-29
Rated 5 out of 5 by from Great Price Great, worked every well, will use it again if required.
Date published: 2020-03-17
Rated 5 out of 5 by from Sentinel X400 Sludge Remover 1L Does what it claims to do.
Date published: 2020-03-10
Rated 5 out of 5 by from Works well with magnetic filter. Added to my sytem due to cool radiators. Wow what a difference after a few hours. Would suggest use of magnetic filter as this puts the black magnetite into solution and allows it to be captured by the magnet.
Date published: 2020-02-29
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