I have had great success with SC2000 for repairs to inflatable boats & it just about sticks anything to anything. Aply with a brush to both sides or give a thicker coat to one side & you dont have that long a pot life so have it all ready & preped to go before you add your hardner ! I used an old keel tube as the material to repair blown seams & holes/tears. Use the buffer before applying & ensure good contact with weights , straps tape or whatever & leave for as long as possible to set & reach full strength. I usually leave them for 3 days min. more the better.
Try to get the hardner in the right proportion which I think was 25 to 1.
In our warmer climates less hardner is better than more & it reaches a higher strength I think though it may take an extra day to cure too much hardner compromises the flexibility & strenght I think. I bought mine through a tire shop but there are a couple of suppliers - a 1kg with hardner is about $80 plus on one site & you need a can of buffer I think you can buy the lot in a kit.