I am repairing some ozone generators and one of them has a tower with a discharge path I can't seem to get rid of. Back in the heyday of television, my dad ran a side (hobby) business repairing bw tv's. Occasionally, he would use what looked to me (a 5 year old) like red varnish labeled "Corona", not the beer. Bing isn't giving me extreme happiness finding the product, so I assume it is now history. Does anyone have recommendations as to what to use?
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\$\begingroup\$ "Corona" is an effect, generally not the cause or solution. Unless there's something I don't know (which is entirely possible). \$\endgroup\$– Ignacio Vazquez-AbramsAug 16, 2013 at 22:26
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Short for "Corona Dope," also found as high dielectric strength insulating paint. Corona dope is still sold by the usual electronics chem suppliers. I find that crazy glue cyanoacrylate works fine. But note that these painted-on coatings are intended to stop HV leakage across a surface. If you have sparks leaping across an air gap, then instead you need a thick material rather than paint.
Silicone caulk works fairly well, but use the ammonia-stink RTV type, not the water-base stuff found in paint stores.
Also note that arcing usually causes and is caused by a carbonized surface path. Make sure to first scrape away any (possibly invisible) damaged insulating surface which has become conductive.
