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Sentinel Internal Leak Sealer 1Ltr

Product Code: 99730

Internal Leak Sealer for small inaccessible leaks and weeping joints in all types of indirect heating systems including those containing aluminium components. Compatible with elastomers.

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Safety Data Sheet (COSHH)


4.7692 5 13

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Available for deliveryNext Day Delivery
Available for collection from store Store Collection Check stock in your store
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Sentinel Internal Leak Sealer 1Ltr 4.8 5 13 13
Easy and painless Sorted 2 small weeps on hard to reach central heating pipes in no time. Pressure holding on the system again. Far less painful than a drain down and replacement. 19 May 2015
Does exactly what it says on t I've used this leak sealer twice. Both times it was to solve the problem of pin sized holes in radiators caused by internal corrosion. The leak on the first radiator was cured within a few minutes of adding the leak sealer. The larger and more troublesome leak that I tackled recently took longer (about 24 hours) to seal but has been dry ever since. Compared to the cost and hassle of fitting replacement radiators, this product is great value and I have no hesitation in giving it a 5 star rating. If it doesn't work for you, then either you are being too ambitious or you haven't followed the (very simple) instructions. 25 Apr 2015
Leak seal that works Does what it says had a customer with a leak on central heating could not find it under the floor used this worked great 14 Apr 2015
Stops leaks dead! This stuff is brilliant. I have used it before on several occasions on those niggly little leaks. It always seals and stays sealed! Wonderful! 8 Feb 2015
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Brand Sentinel
Colour White
Manufacturer Guarantee 1 years
Manufacturer Guarantee 1 years
Pack Size 1
Product Type Internal Leak Sealer
Sealant Adhesive Volume 1 Ltr
Total Product Weight 1073 kg