central heating back boiler leak

andybike

Our Baxi Bermuda w2 back boiler seems to have sprung a slow leak and I have seen these CH leak sealant fluids and wondered if these sealants were any good?

ATB and Merry christmas
Andy

gas4you

In a word no.

They tend to work for a few months at the most and only with the smallest of leaks.

michael_nod

yes they do work andy,
my friend put fernox leak sealer into his boiler/system ten years ago,
it has been fine since......
bye
michael nod

garethgas

This stuff tends to be used when access to make a proper repair is restricted or likely to be prohibitly expensive.
It also depends how big and where the leak really is.
I've used it in the past with about a 50/50 success rate. To be honest, I'm not a big fan of the stuff as it sometimes seals the leak then starts again at a later date which, as a professional, looks bad as customers then think you haven't done a proper job.
As a DIY though, I suppose you've got nothing to lose by trying it, you might be lucky.

andybike

the leak got a little worse(drip a second) but its only a few quid so nothing to lose, thankyou all for your replies and a merry christmas to you all.

ormus

i agree with gareth.
50/50 chance of success. its the same with car radiators.

andybike

update...fernox sealant not worked but did slow the leak down so it looks like a system drain is needed!

gas4you

andybike wrote: »

update...fernox sealant not worked but did slow the leak down so it looks like a system drain is needed!

Sadly just proves you should listen to the pro's on here:)

keystone

andybike wrote: »

update...fernox sealant not worked but did slow the leak down so it looks like a system drain is needed!

I wish I could say that I am surprised.

Cheers