Sentinel Internal Leak Sealer 1Ltr
Stops leaks dead!
This stuff is brilliant. I have used it before on several occasions on those niggly little leaks. It always seals and stays sealed! Wonderful!
8 Feb 2015
Does the job
Used this after numerous attempts to stop weeping from two very hard to reach radiator valves.
Simply drained a bit of water out of the system and added it to a radiator after removing one of the plugs
The leaks have stopped and the system has not lost any pressure since I added the product three weeks ago. Very impressed (and relieved)
I also bought the dosing kit, seems a bit dear for a few plastic fittings and a bit of tube, but it saved a lot of time and mess when adding the leak sealer to the radiator and I would recommend it.
20 Jan 2015
I never changed my rad valves after installing my condensing boiler, inturn they all started dripping and so I was forever topping up the system. Before replacing the rad valves I decided to give the senital leak sealer a chance and now 24 hrs later I am pleased to say the valves have stopped dripping. Full marks to this product then and I'll change the rad valves in the summer.
4 Dec 2014
Sealed some invisible leaks
Added this to a customer's sealed heating system which kept losing pressure but no visible leaks, now it's fine.
15 Jun 2013