Or pretty much any inflatable valve…
I have a Neoair remnant I was given by someone who cut one down.
Sealing it is not an issue, I'm just curious as to how to glue in a new valve.
Thermarest sells a replacement valve kit- they say to just twist/pull out the old valve and glue in the new one. I figure I'll just seal the seam (iron it) down, leave a ~1/2 hole for the valve, and glue one in.
What'ya think?
Tips appreciated.

