Also, I should mention that I've used PTFE tape without any issues for air tool connections. It's just for plumbing - where even a slow, tiny leak can cause massive damage - where I think it's a terrible choice.
It's perfectly usable but you need to wrap a lot of it. If you wrap so long that you can barely make out a thread underneeth you can have a good seal lasting decades even if you don't screw the thread in completely.
On steel pipes and fittings obviously. Plastic ones might crack.
Also hemp fiber requires bit more practice and leverage but it's really good.
