Aquaseal Twin Pack (7g X 2) Tubes
Hands down the best glue for repairing waders of any fabric.
Works equally well on breathable waders, neoprene waders, and PVC waders. Dries flexible to maintain a strong bond with repeat use.
Why a twin pack?
Once you open one of these tubes, they're exposed and the shelf life begins. They'll last a couple of months once opened but you'd hope you're not repairing waders that often...! So a twin pack allows you to do your repair, and then keep a backup tube handy for the next one. If that happens after a couple of years, then you'll still have a tube that's in good nick and ready to squirt.