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Sentinel Internal Leak Sealer 1Ltr (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.

  • 1 Year Guarantee

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£13.99INC VAT (£13.99/Ltr)

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Sentinel Internal Leak Sealer 1Ltr is rated 4.8 out of 5 by 29.
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Rated 5 out of 5 by from Save on digging up the floors Had a tiny leak somewhere under the ground floor, so that the pressure kept dropping. No weep from the pressure valve, so I thought that I would try this stuff. 48 hours later it all looks good. Did a complete drain and flush before adding it using the simple filling kit into a radiator, together with the Sentinel inhibitor (which I had already bought). Can't give meaningful ratings for performance or reliability, as only 2 days into service.
Date published: 2016-12-20
Rated 5 out of 5 by from Sentinels little helper Great way to seal leaking push fit couplings when pipe is scratched.
Date published: 2016-12-11
Rated 5 out of 5 by from Well worth trying My 15 year old Worcester 24i combination boiler was losing pressure daily resulting in the overheat sensor tripping out. Told by heating engineer that must have a leak in system as nothing wrong with boiler. Assumed not in upstairs pipework or radiators as no sign of water damage. Did not fancy having to lift carpets and flooring down stairs to try and find leak. Bought Sentinel leak sealer to give it ago although a little sceptical it would work. BUT IT DID WORK. Boiler pressure now stable for last ten days. Only thing to be aware of is that it does not flow easily as is like thick PVA glue. So make sure if using tubing and funnel that it is large enough to flow easily. I drained system down enough to take off valve from upstairs radiator and fed tube into pipe. Worked for me. Better than lifting all the downstairs flooring! Happy days.
Date published: 2016-11-21
Rated 5 out of 5 by from Well worth the money I purchased this to sort out a small leak I had on my towel radiator, I removed the non bleed valve plug and used a length of tubing to remove a ltr of water, I then poured in Sentinel leak sealer, replaced the plug, turned on the system bled the radiator, hey presto no more leak. I would highly recommend this product to anyone who has the same problem.
Date published: 2016-11-08
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Will this stuff work

Will this sort out a small drip on one of my tectite fittings,when heating is on it doesn't drip,but when heating is off it starts to drip again
Asked by: Wader
Hi there, Sentinel Leak Sealer is ideal for use when minor leaks don’t warrant immediate repair. For instance, you may notice a weeping joint or some minor pinhole corrosion. Kind regards Customer Service
Answered by: Sentinel Product Help
Date published: 2017-02-13

Air Source Heat Pump

can this be used on an ASHP that is working with a Glycol anti freeze mix?
Asked by: Dmmm
Hi there, the Sentinel Internal Leak Sealer is not suitable for this situation. Kind regards Customer Service
Answered by: Sentinel Product Help
Date published: 2017-02-12

can this sealer be used with a vaillant ecotec plus 618 boiler

Asked by: woozy100
Hi there, the Sentinel Leak Sealer can be used with a Vaillant Ecotec Plus 618 Boiler. Kind regards Customer Service
Answered by: Sentinel Product Help
Date published: 2017-01-08

Is sentinel leak fix suitable for cast iron column type rads?

Asked by: greatly
Hi there, Yes the Sentinel Leak Sealer is suitable for cast iron radiators. Please note that Sentinel Internal Leak Sealer is designed for just sealing pinholes and we would always recommend that ultimately, the cause of the leak is identified and rectified Kind regards Customer Service
Answered by: Sentinel Product Help
Date published: 2016-12-11

Can Sentinel Leak Sealer be added to a system that already contains Sentinel X100 Inhibitor?

Asked by: DeckchairDave
Hi there, The Sentinel Leak Sealer is compatible with the Sentinel X100. Kind regards Customer Service
Answered by: Sentinel Product Help
Date published: 2016-12-30
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Specification
Brand Sentinel
Manufacturer Guarantee 1 Year Guarantee
Manufacturer Guarantee 1 Year Manufacturer's Guarantee
Pack Size 1
Pieces in Pack/Case 1
Pieces in Pack/Case 1
Product Type Internal Leak Sealer
Sealant Adhesive Volume 1 Ltr

Downloads

Safety Data Sheet (COSHH)