Thread: Repaiiring air mat? - Micro leaks across whole surface

I suspect it's a lost cause and is trash however does anyone have a method to seal an air mat that has dozens of micro leaks across it's surface?
When held underwater they're only tiny bubbles but there's so many it's flat in just a couple of minutes. It's like the fabric has become porous.
Hasn't had much use, maybe 20 nights so not worn out and has been treated well, always in tent or on ground sheet if under fly. Strangely it's the upper surface too, not the underside.