Permanent temporary fix is a classic oxymoron..

No, a boot by it's nature is a temporary fix for a hole in the tire casing,
to get you to where you get a new replacement tire.

2 sound fixes I have in my kits : a piece of Hypalon , a rubberized canvas
they make rubber boats out of,
or the packaged boot patches Park Manufactures . [un-opened so far]

In the past I have used a section cut from a friend's dead Budget sew-up Tire.

On tour, I just put on Tire #3, when the sidewall gave out.
the old one was left in a farm tractor shed in Scotland.