This product works extremely well.
www.kitepower.com.au/collections/kitesurfing/SPGeneralSelleys polyurethane, might work, but it foams as it cures and can leave tracks for air to leak. Sikaflex make a clear non foaming polyurethane glue, some Bunnings stores stock it, otherwise try Repco or a motor parts retailer.
The only issue I have with glue is the time it takes for anything that works, to cure, usually 6-8hrs minimum.
Stick on replacement valves work really well, and you can be back on the water in 30 mins. We have been trialling another excellent product that we will be stocking call a "Valve Trap", news on that soon, keep an eye on the website or subscribe to our weekly news.