Hi,

I have Klymit mat, and while I tested it, the valve pop out...
So, after applying the warranty, and seeing that the mail won't get on time, I had to fix it before I'm out.

So... Tapping the hole and closing it with a M5 screw wrapped with Teflon tape sealed it.

Part B came when I found out that air is also leaking through the inlet.
I tried to clean it and add some silicone grease. It slowed down the leak, but not enough.
I started tapping the inlet with presta valve, and used the valve base for grip and momentum.
I chopped some presta valve in a length match to the inlet length, cleaned the burr, from the cut edge, so it won't retap the inlet.

Don't forget the cap, or else it will make another hole in the mat.