Cheers Mark. As I said it was really easy to use and quick. It goes off in an hour, so for that amount of damage I'd use that rather than solar rez.
Solar rez would be good for a quick seal up and go but you'd have to go back again and fix it properly to get the original shape back and drain out any water that got in.
I was lucky, (or is that unlucky), that I could leave the board hanging in the shed for a month to dry before repairing.
The knead it cost me $20 and an hour of my time. I'll probably end up painting it at some stage.
Thanks for the tips everyone.