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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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4.4444 5 9

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No Nonsense Central Heating Leak Sealer 500ml 4.4 5 9 9
No nonsense leak sealer Very good, the seepage from my oil fired central heating boiler stopped overnight. However, it is not stressed that the best way to administer the liquid is via one of the radiators. If you dose the head tank it may take a while before it takes effect. I used a 60ml syringe and a 75 mm length of 2mm plastic tube to feed it in through the radiator bleed valve. This could be added as part of the order. 4 Dec 2014
Worked a treat Got an 14 yr old Baxi boiler that developed a leak a few days ago. Only dripped every 10 seconds until this morning when started to drip sub second. Bought this product (obviously). Turned off isolator valve on small header tank in loft. Opened heating system drain valve - (just outside rear door on my house) and drained the system until the header tank was empty + a bit more. Then close valve. I could have put the fluid into the header tank at this point but decided to add to the top of the towel radiator instead as this guarantees it gets into the system.. Turned on isolator valve in loft to refill tank. 5 mins later turned on boiler and bled all radiators. Now I'm still in shock, but the leak stopped immediately! I never get this lucky so if all this goes bang in the next few days I'll update this review. I should add I did buy the application kit. I didn't really need it to pour into towel radiator but guessing it would be useful if trying to "side fill" a normal radiator. 15 Jan 2014
Remarkably good! My system was losing its pressure overnight. No sign of leaks at radiators and all piping is underneath floors and hard to access. I put Screwfix no nonsense sealer in by emptying the filter and tipping it in. Left the heating running for a couple of days. No further pressure drop in the last couple of weeks so fingers crossed. No hassle and saved a fortune in plumber call outs at this busy time. Great result from such an economic product. 7 Jan 2014
Better than expected After fitting a new radiator I had a very small leak on the in flow pipe where it was connected to the radiator. After tightening as much as physically possible and finding it still leaking, I had resigned myself to having to drain the whole system to reseal and hope the leak had stopped - but decided to give this a try first. I was in two minds about it's performance but gave it a go based on the other reviews - and was glad I did. Was easy to add to the system, just drain down a little and add to the header tank and refill. I let the heating run immediately for a while after adding to circulate, and to my delight less than two hours later the leak had completely stopped. Excellent value for money and absolutely does exactly what it says it will. Brilliant! 14 Dec 2013
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Brand No Nonsense
Pack Size 1
Product Type Central Heating Leak Sealer
Sealant Adhesive Volume 500 ml
Total Product Weight 0.55 kg
Volume 500 ml