If the tape is wrapped properly (which 99% of people don't know how to do), no tape will ever get into the piping / flow.
Bingo! Give the man the prize. You know how to wrap teflon / sealant tape properly.I've had teflon tape on my holley fuel line over 15 years not even a stain and no issue with carb. When I applied It I left first two threads bare and wrapped the other threads. Seem to work
I agree with you that you "should" never need anything on the fittings but sometimes things aren't perfect. In my case where the Try Blu sealant was used, I had a fuel sump that would not tighten up enough to seal. I was approaching the point of thread failure which would have necessitated tank removal and welding a new fitting on. I believe it was 1/2" NPT to a male -10 AN. Maybe the sump fitting was damaged from its initial welding, who knows, but the Tru Blu flat out worked !I would redo my crimps and fittings .Gas should never need anything on pipe compression fittings,if it leaks its not tight enough or gauled fittings.I have used various things over the years and got away with teflon tape but learned that anything you put on it can dislodge and leak.A tight leak free fit is the only way with fuel or brake fluid.
That’s a lot of products to own that $1.95 stick I put a picture up of does everything and doesn’t expire.Gasolia is probably the best product on the market. Thread Sealant Application Selection Guide | Gasoila
LOL...That’s a lot of products to own that $1.95 stick I put a picture up of does everything and doesn’t expire.