Fish-finder, Buy the cheap stuff called shoe goo it will cure your leaky boots as well as the higher priced alternatives such as aqua seal its all good, had a shipwright friend of mine that patched up old extra tuffs with 5200 marine sealant and it stuck for years without leaking but you don't want to open a tube of that stuff unless you are doing a big job. If you have any of these tubes laying around just put it on heavy and let it dry. Good luck on your next waders which should be breathable for under 100US.