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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)


4.7273 5 11

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Sentinel Internal Leak Sealer 1Ltr 4.7 5 11 11
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
Does the job Used this after numerous attempts to stop weeping from two very hard to reach radiator valves. Simply drained a bit of water out of the system and added it to a radiator after removing one of the plugs The leaks have stopped and the system has not lost any pressure since I added the product three weeks ago. Very impressed (and relieved) I also bought the dosing kit, seems a bit dear for a few plastic fittings and a bit of tube, but it saved a lot of time and mess when adding the leak sealer to the radiator and I would recommend it. 20 Jan 2015
Job done I never changed my rad valves after installing my condensing boiler, inturn they all started dripping and so I was forever topping up the system. Before replacing the rad valves I decided to give the senital leak sealer a chance and now 24 hrs later I am pleased to say the valves have stopped dripping. Full marks to this product then and I'll change the rad valves in the summer. 4 Dec 2014
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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