Fernox Heating Leak Sealer Superconcentrate 290ml
Best of the bunch
Not cheap compared to some of the other similar products, but well worth it as this one really works!
Easy to use, the supplied connectors ensure easy mess-free injection, whether into a radiator or the boiler's charging loop, you just need to provide your own skeleton gun.
Many manufacturers warn against using these injectable sealants as they can clog the elements in the boiler, it's worth mentioning than this is the ONLY such product that Worcester Bosch specifically endorse.
4 Feb 2014
This is the stuff plumbers do not want you to know about!
I had a leak in the central heating system under the floor. My boiler pressure was going from 1.5 bar to nothing within 12 hours so it was a significant leak and to solve the leak I was faced with taking up the newly laid floor in the living room and potentially needing to get the kitchen/ bathroom pines re-laid as they are in a concrete floor.
Faced with the above I thought I would give this product a go but didn't hold out much hope as all other leaks I read reviews on seemed minor in comparison to mine.
I tried this product and it worked straight away - no more topping up the boiler, no more leak! I fixed the leak 3 months ago and its been totally fine since. I don't know how this product works but its amazing.
I would totally recommend this product as a much cheaper and much easier alternative to a plumber!
One thing I would say as while this product can be put into the heating system on your own, its easier if you have someone to help you as 3 hand are sometimes useful!
24 Dec 2013
Saved me pounds
I envisaged a polished wood floor having to be taken up ,but 24 hours after applying this to the heating system the boiler pressure has not decreased. It was simple to use and would use it again if the need arises .[fingers crossed it doesn't]
9 May 2012
I recently had a new combi boiler installed and had other plumbing work completed to my old central heating system. This unfortunately induced a pressure loss in the system of 1 bar over a time period of approx. 1 day, necessitating constant topping up via the filling loop.
I purchased the fernox leak sealer and injected it via the filling loop using the kit included with the sealer. A very easy process taking less than ten minutes with a mastic gun (not supplied). That was over three weeks ago and their has been no pressure loss at all since. Basically, the sealer worked immediately. Brilliant. Hope this helps persuade future customers to purchase this miracle product.
12 Jan 2011