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Discuss Sentinal leak sealer on pressurised systems in the Central Heating Forum area at

  1. finchy01

    finchy01 Plumber GSR

    Afternoon all,

    Short and to the point.

    Have any of you experianced any problems using the sentinal leak sealer on pressurised systems?

    Think the leaks underfloor so want to try this before getting thermal imaging guys in.

  2. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    Nope. But not used it for years. Check with the boiler manufacturer before you use it though as some do not like it in there boilers
    • Like Like x 1
  3. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    I would try find the leak first before putting that in . Its proper "last resort" that stuff.
    • Like Like x 1
  4. finchy01

    finchy01 Plumber GSR

    They've had the drop in pressure for a few months now and have seen no evidence of a leak so it must be under the floor. All new solid wooden floor so they don't want to start ripping it up unless thebhave to. Any other suggestions on tracing without the thermal imaging?
  5. Chuck

    Chuck Top Contributor!!

    The usual methods (acoustic testing then confirmation using thermal imaging, tracer gas and moisture detection) are normally best subcontracted to a specialist firm. Google 'leak detection services'. They tend to be regional rather than locally based. Having the right kit means they can work miracles remarkably fast and you'll be able to have a sensible discussion about whether to isolate the leaking section or start digging.

    I would only consider leak sealer as a last resort after a getting a reliable diagnosis. IME the stuff either doesn't work or is a relatively short term fix. I don't need to tell you how much damage a gradually acting leak can cause and it won't be covered by household insurance.
    • Like Like x 1
    Last edited: Apr 22, 2017
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