Hyperstretch

I've used that wetsuit glue a bit murph and its icky stuff. You have to try and get it around the edge of the hole and let it set for 5 to 10 mins. This will mostly soak in. Then apply again and wait another 10 mins before pushing the edges together. It actually needs to be semi dry before you push it together. You don't just fill the hole up as it needs to adhere to itself. With a small hole you need to hold the hole stretched open while the glue sets. It feels like you need three hands to apply the glue while stretching the rubber open so get someone to help. Good luck and try not to get that crap all over yourself and your clothes. Easier said then done!

Marine sikaflex. Just put a big blob on and smear it over. Flexes, stretches and never comes off.