> To be successful you will have to completely remove all of the burn mark
> that is now conductive. That's impossible to do without removing some of
> the ceramic leaving a bigger gap in its coverage.
>
> The ceramic insulation probably is handling 5000 to 10,000 volts. JB
> Weld probably conducts with that kind of voltage applied. I'd rather use
> Corona Dope made for TV repairs, but a bottle probably costs as much as
> the new igniter.
>
The epoxy will burn off the first time the furnace ignites. The
electrodes run red hot. Even if the arc tracks are on the outside
of the combustion chamber, the ceramic will be too hot for the
epoxy. Gerald is right about removing all traces of the arc track, of
course.
-Susan