I'm replacing the temperature gauge sending unit on my truck. I don't want to use teflon plumber's tape. It doesn't hold up to the ethylene glycol in the antifreeze. Or could split off and clog something.

Is there a good sealant to use on the threads?

Thanks.
Mark


1956 Chevy 3200, 1/2 Ton, 235 CI
https://photos.app.goo.gl/TQQo1YnFjs3U7xB57