Can Fernox sealer work in a microbore system or will it block

[glynnt]

The heat exchanger bottom plate is leaking in my Ideal Icos HE12 boiler. Apparently its not an O ring type gasket but a silicon paste and they often fail if they are stripped down and a new paste applied.

So what I want to know is can I put Fernox sealer into a microbore system or is it likely to block if theres an air bubble....and is it likely to do the job of sealing the heat exchanger?

Thanks for any input

 

[ferret]

Strange question , do you have an air bubble in your system then ? F4 will seal the leak it stays liquified untill it finds a leak then seals it , a bit like rad weld only ten times better

 

[glynnt]

hah, I suppose it is strange. Perhaps I have'nt worded it properly. Just had a Corgi installer round and he felt that the Fernox might seal the heat exchanger but because I have microbore he was worried that it could cause a blockage in the future. I suppose he was thinking if you get an air bubble, I mean are'nt they fairly common?