Re: Best oil-proof sealant?
I have used non acid cure silicone rubber for EHT applications, its cheap. For it to work everything has to be clean & oil free initially. It does successfully seal against oil, I used it on my own oil filled EHT probe.
Another sealant and glue I used on it was Torr Seal by Varian Vacuum, which is a white high vacuum sealant two part epoxy resin, but its diabolically expensive. Though I managed to use it to successfully seal a crack in a CRT.
I have used Hylomar blue when I rebuilt a Borg-Warner 35 transmission in my 1963 Humber Scepter when I was about 17. I have not tried it for high voltage applications.
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