A single teflon gasket from Teflon sheet also makes a perfect seal. Doesn’t burning Teflon give off a deadly fume? Oliv on the Mamod forum has posted warnings about that…
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As long as your Jensen boiler never runs dry, the gaskets will never burn.
I’m talking about Travis burning the strings of teflon tape off with a torch. I make the same teflon gaskets for my porthole glasses that you do as well.
The warning Oliv gave is that burning it can actually kill a person.
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I suppose I'd be more concerned about letting a coated frying pan on the stove with nothing in it for too long.
I missed the part about burning away excess with a torch.
Excess teflon tape is better dealt with by the use of a sharp blade.