Wouldn't glue just break down very quickly with petrol in contact? Fortunately, my hole is not on a seam so I'm going to attempt the bolt and large washer idea, maybe with a bit of sikaflex for good luck.
There has to be a petrol resistant glue out there...somewhere...
I've just heat welded the leaks and used the spare material as a filer rod and it's not leaking any more This is the same method used to make the bladder, but I used a soldering iron
It will still need a patch over the top so I guess I'll look into that next....
This is the same method used to make the bladder, but I used a soldering iron 
