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No Nonsense

No Nonsense Central Heating Leak Sealer 500ml

Product Code: 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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Safety Data Sheet (COSHH)

£7.99

INC.
VAT

(£15.98/Ltr)

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Rated 5 out of 5 by Great Stuff! Changed a rad but unfortunately got a leak from stretching a joint whilst undoing/tightening connections.Was losing 500ml to 1 litre daily.Tried to put this into radiator directly but ended up with most on floor so put it in header tank and prayed.Had slowed down considerably inside 2 hours and the next day totally dry!Bobs yer uncle jobs a good un! 18 Jan 2016
Rated 5 out of 5 by Very Impressive !!! Had a leak from one of the inline valves on bottom of bathroom ladder style rad. Head was not removable to get to the gland, so thought nothing to lose, give it a go. Closed both valves & let rad cool. Took out one of the top blanking plugs, syphoned off 500ml of water into a measuring jar, added the bottle of leak sealer via filling kit, replaced blanking plug, cracked one valve open & bled rad, opened both valves fully, checked after 5 mins.........NO LEAK !!, checked after 15 mins.......NO LEAK, checked after one hour........NO LEAK !!!! A 15 minute job & job done :-) 15 Jan 2016
Rated 5 out of 5 by Life Saver I had a leak in a cloakroom radiator, the valve at the bottom had leaks from various parts of the joint.I tried tightening the fixings, wrapping with PTFE tape, slapping on external leak sealer - no joy. Every morning another puddle - and by now it wasn't only the joint that was weeping. Pretty much resigned to removing the whole thing and refitting when I found this on the Screwfix website. Bought it, drained a downstairs radiator into a measuring jug so I knew I'd made enough space for the sealer. Removed the vent valve from the bathroom radiator then poured the leak sealer into radiator using the measuring jug - no mess, no filling loops, no funnels. Repressurised the heating, fired it up and 4 hours later leak was sorted. Absolutely delighted with this and also sleeping soundly knowing that if any other joint develops a leak it'll sort itself out without me lifting a finger. Brilliant ! 15 Dec 2015
Rated 5 out of 5 by Does what it says! I have been having trouble maintaining pressure in the central heating/hot water system and could not find the cause so assumed it was seepage from joints under the flooring. 500ml of "No Nonsense Central Heating Leak Sealer" did the trick - pressure maintained. The fact that it works and is so competitively priced makes it a 'no brainer' to use instead of more expensive competitor products. Thank you very much Screwfix. 5 Dec 2015
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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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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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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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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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Specification

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Brand No Nonsense
Pack Size 1
Pack Size 1
Product Type Central Heating Leak Sealer
Sealant Adhesive Volume 500 ml
Total Product Weight 0.55 kg