has anyone any reccomendations for permanently repairing a hole in a drybag, i have an outdoor designs drybag that has a matchbox size hole (through melting / too close to stove / careless) just underneath the top-edge where it rolls down, i have temporarily used gaffer tape on the outside but it refuses to stick to the inside, as funds are exceptionally low at present i would like to repair if possible instead of buying new, but would like some permanent reliable repair, it is in an area where it takes regular handling being constantly rolled up and down so gaffer tape keeps coming off, any suggestions?, what glue would be ok, suppose it needs to be pliable and waterproof.