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No Nonsense

No Nonsense Central Heating Leak Sealer 310ml Concentrate

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.

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Rated 5 out of 5 by 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. 24 Jun 2015
Rated 5 out of 5 by 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!!! 30 Mar 2015
Rated 4 out of 5 by miracles can happen easy to use,good easy instructions, fantastic repair, saved a fortune. 9 Jan 2013
Rated 4 out of 5 by Seems to have done the trick Used on towel rail in bathroom, where the valves always seem to leak from under the caps (it was definitely the spindles, rather than it trickling from elsewhere). Had already replaced valves twice, so needed another angle of attack. Used this stuff, and it appears to have worked a charm within a few hours. Word of advice - when using, I found I had to open both valves on the rad, rather than just one as indicated in the instructions. No way I could get it in with only 1 open. Also, on a tall towel rad like mine, I could really have done with a second pair of hands to open the valves while I kept the pressure on the trigger of caulking gun. Not an issue with product at all, just my own ergonomics. Used the 1/2" screw thread adaptor that came with product to administer straight into bleed valve at top of rad. Easy peasey. 8 Oct 2012
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16 Nov 2015
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This product is more concentrated to treat 100L like the liquid 500ml version. They are essentially the same but the concentrate gel is designed to treat sealed systems using a sealant gun to inject directly into the circuit. Yes it can be added via the top bleed screw of the Magnaclean. Make sure you relieve system pressure and have the Magnaclean service valves open otherwise you might struggle to defeat the system pressure with the sealant gun. Re pressurise after use. We also recommend that you switch off the system and allow it to cool so that you don't expose yourself to excessive heat. Once injected you can restart the system immediately.
17 Nov 2015
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Brand No Nonsense
Pack Size 1
Pack Size 1
Product Type Central Heating Leak Sealer Concentrate
Sealant Adhesive Volume 310 ml
Total Product Weight 0.35 kg