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No Nonsense Central Heating Leak Sealer 500ml (88705)

500ml. Internal leak sealer for small, inaccessible leaks and weeping joints which reduce system pressure. Effective within 24 hours. 500ml treats 100 litres.

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£7.99INC VAT (£15.98/Ltr)

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Rated 4.7 out of 5 by 27 reviewers.
  • 2016-05-04 T06:50:41.466-05:00
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Rated 5 out of 5 by Quick, Easy, Good Was losing 1 bar of pressure over 24 hours in a 15 radiator system. No visible leaks above ground (concrete / fitted hard wood floors). Applied this product and after 7 days pressure is rock solid. 27 Apr 2016
Rated 5 out of 5 by Central Heating Saver EXCELLENT!!! My system was losing in excess of 1 bar pressure everyday and I couldn't find the leak (probably underfloor). One 500ml application and the pressure is holding after 24 hours. Saved ripping concrete floors up. Very easy to use. 25 Mar 2016
Rated 5 out of 5 by Great product for the price Having read lots of reviews it was a no brainer to give this product a try at this price. My mains pressure heating system had a small leak somewhere and pressure was fluctuating so added this leak sealer and yes it did the trick. there are many other brand names at higher prices but if it works well what's to lose using this one? Adding this via modern towel radiator was easy with a little effort to drain one of the lower system rads first to create some space - but remember to anticipate how much you'll need - this is ideal for a smaller volume system say a typical three/four bed house I had 22 rads to contend with but it still did the job admirably let's face it at this price what are you going to lose. 24 Mar 2016
Rated 4 out of 5 by Does what it says on the tin! Bought as a last resort to fix a slow leak in the central heating circuit which I had spent ages trying to trace without success. Leak sealer has been in a week now and the system is finally holding pressure, previously it would drop to zero in 2-3days. I am hopeful this is now a long term solution to the pressure fault, hence I cannot give a proper reliability rating at this time. 5 Mar 2016
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4 Questions  3 Answers

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i have a pipe leak somewhere but unable to find it,was told about this product used by a neighbour but his boiler is an old type not a combi
4 Feb 2016
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newport
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Answer: 
Yes the product is suitable for use with combination boilers and ideal to stem the leak you describe.
6 Feb 2016
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10 Jan 2016
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Elgin
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Answer: 
Yes you can. It's a misnomer that air causes this product to catalyse like the car product Radweld; it doesn't. It works by altering the surface tension of the system water so it works by forming a soft seal in capillary leaks. Air in the system may be caused by a mechanical fault that Leak Sealer can't fix, but it represents the cheapest option that should be explored first.
10 Jan 2016
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22 Nov 2015
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sunderland
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Answer: 
No - this is not the use for which the product is intended. It will seal leaks in sealed systems and is best for capillary leaks. The toilet cistern continually changes water. You may have better success with No Nonsense External Leak Sealer to deal with your specific leak.
23 Nov 2015
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27 Sep 2015
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liverpool
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  • 2016-05-04 T06:40:31.332-05:00
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Specification
Brand No Nonsense
Pack Size 1
Pieces in Pack/Case 1
Product Type Central Heating Leak Sealer
Sealant Adhesive Volume 500 ml
Total Product Weight 0.55 kg

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Safety Data Sheet (COSHH)