No Nonsense Central Heating Leak Sealer 500ml

Product Code: 88705
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.


  • 1 Year Manufacturer's Guarantee
  • Effective Within 24 Hours
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Safety Data Sheet
€9.95 Incl. 20% VAT
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Additional Information
Technical Specification
  • Brand : No Nonsense
  • Sealant Adhesive Volume : 500 ml
  • Product Type : Central Heating Leak Sealer
  • Pack Size : 1
  • Manufacturer Guarantee : 1 Year Manufacturer's Guarantee
  • Pieces in Pack/Case : 1
Product Contents
Delivery & Returns


Standard delivery: €15

Free delivery on all orders over €70.00

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No Nonsense Central Heating Leak Sealer 500ml is rated 4.7 out of 5 by 32.
Rated 5 out of 5 by from Easy to use - does the job I used this a year ago to seal a few weeps at radiators on my central heating system. was sealed within half an hour and has held good for over a year, what more could you want? I added it via the towel radiator after checking a video online
Date published: 2016-08-11
Rated 5 out of 5 by from Does exactly what it says on the bottle! I'm not a plumber or a spark just a punter, but I got this to fix a leak in my solar water system. Never mind waiting 24 hours, it was fixed and holding pressure in 30 minutes!!! Highly recommended if you want simple like I do.
Date published: 2016-08-01
Rated 5 out of 5 by from Brilliant liquid I'm not a plumber or an electrician or anything like that but I had a leak and this cured it. It actually only took about 15 minutes!!!!! Pressure in the system has been rock solid for almost a week. Usually had to re-charged every couple of days.
Date published: 2016-07-29
Rated 5 out of 5 by from Worked for me. My system pressure has been dropping for 9 - 12 months now. Started with maybe monthly top up required but lately down to weekly. Leak is obviously under floor, and access is very difficult. Saw this and bought it, added it to system 8 days ago and system pressure seems to be steady with no loss. Checked my accumulator tank when system partially drained, 8 psi, and system pressure now holding steady about 20 psi. Going by the other reviews I am hopeful this will be a permanent repair, and hopefully has negated the need for expensive fault finding and repair.
Date published: 2016-06-17
Rated 3 out of 5 by from value brand half price of others and probably same stuff/ pva mix? need time to tell if it works on this particular job though!
Date published: 2016-06-16
Rated 5 out of 5 by from 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.
Date published: 2016-04-27
Rated 5 out of 5 by from 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.
Date published: 2016-03-25
Rated 5 out of 5 by from 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.
Date published: 2016-03-24
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