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£10.48 Exc. VAT £8.73
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Product Details

Ideal for sealing small leaks or weeping joints on all types of indirect central heating systems. Easy-to-administer solution and will not cause blockages within the system.

Technical Specification
Brand Sentinel
Safety Data Sheet click here
Type
Volume (L) 1
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 Leak Sealer 1L is rated 4.4 out of 5 by 27.
Rated 5 out of 5 by from great prices great price for the product. service is always good anyways.
Date published: 2020-05-18
Rated 3 out of 5 by from Best price I could find It's early days but appears to have done the job
Date published: 2020-05-18
Rated 2 out of 5 by from Nope Did not work for me. Waste of money
Date published: 2020-04-30
Rated 5 out of 5 by from Excellent product It stopped a very slow leak somewhere in the system
Date published: 2020-04-21
Rated 5 out of 5 by from Excellent Excellent service as usual
Date published: 2020-04-19
Rated 5 out of 5 by from Was topping up boiler far to regularly this helps Working a treat a noticeable difference
Date published: 2020-04-18
Rated 5 out of 5 by from Works Bought just before lock-down as worried about a leaking solder joint. Easy to apply and worked a treat - no more leaks
Date published: 2020-04-05
Rated 1 out of 5 by from not impressed order placed online went to collect couple days later not in stock but when I placed order 2 in stock took ages to be told this in store
Date published: 2020-03-07
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