Can Fernox leak sealant be used in a microbore system

[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

 

[transam]

Hmm dunno about that ?? As for the fernox leak sealer I have used it with success How ever it has also proved to be a disaster !

It blocked up a stainless steel heat exc on a condensing boiler ?? & the point is the heat exc in question is made up of coiled tube that is probably 10 mm. Giacomo type exc !

when you use it u take your chances ?? on the old cast iron boilers ect it was not such a problem , these modern day condensers ???????