No Nonsense Central Heating Leak Sealer Concentrate 310ml

Product Code: 90485
No Nonsense Central Heating Leak Sealer Concentrate 310ml
Product Code: 90485
310ml. Internal leak sealer for small inaccessible leaks and weeping joints which reduce system pressure. Effective within 24 hours. 1 tube treats 100 litres.


  • 1 Year Manufacturer's Guarantee
  • Effective Within 24 Hours
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Safety Data Sheet
€12.45 Incl. 20% VAT
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Additional Information
Technical Specification
  • Brand : No Nonsense
  • Sealant Adhesive Volume : 310 ml
  • Product Type : Central Heating Leak Sealer Concentrate
  • 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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Hopefully you won't need to return an item, however, if you do, it is our aim to make this as simple as possible. By following the guidance below you can help us to help you when a product is not what you expected, or is faulty. Your statutory rights are not affected by this guidance.


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No Nonsense Central Heating Leak Sealer Concentrate 310ml is rated 4.2 out of 5 by 15.
Rated 5 out of 5 by from Spot on! Easy to use and does what it's supposed to. Works quickly to seal slight leaks beneath the boards.
Date published: 2016-10-28
Rated 5 out of 5 by from Effective & good value! I replaced my multifuel stove with one with a bigger boiler. All finished and commissioned. A drip was then noticed under the stove at the back. No way to fix without removing stove and remaking joints. No nonsense central heating leak sealer tried (nothing to lose!). Easy to inject through a radiator and leak stopped. Job done and no great cost.
Date published: 2016-04-09
Rated 3 out of 5 by from Easy to use Easy to use with enclosed adapters, but don't use as directed on a pressurized system unless you want it all to blow back out the end of the cartridge! Either partially drain the system to reduce the pressure, or inject into an isolated, partially drained radiator.
Date published: 2016-04-04
Rated 1 out of 5 by from Disappointing I bought this to cure a leaking radiator/valve interface, it wasn't a leak as such,more of a seep. I followed the instructions without a problem and emptied the entire cartridge into the radiator, expecting the seep to stop within 24 hours. 4 days later and it's still leaking! If anything it's worse. So I'll do the job properly, drain down, reseal, reconnect . Waste of time & money.
Date published: 2016-02-16
Rated 4 out of 5 by from Leak Seal A great Product, The 1/2 inch adapter makes it easy and mess free to install
Date published: 2016-02-04
Rated 5 out of 5 by from Radiator leak Developed a leaking resistor and being just a pensioner. I did a search to see the easiest and cheapest way to sort it out. So very pleased to find this product on screwfix. Ordering was simple and delivery fast.
Date published: 2015-06-24
Rated 5 out of 5 by from Does what says on the tin! I had tried allsorts before this including three (expensive) visits from heating engineers. five minutes work and 24 hours later, leak sorted!!!
Date published: 2015-03-30
Rated 4 out of 5 by from miracles can happen easy to use,good easy instructions, fantastic repair, saved a fortune.
Date published: 2013-01-09
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