I'm giving a repair another shot: Cut a circle of HD polythene, spread the mastic over it and then with a couple of made up tools have fitted it inside over the crack and rollered it down with a small wallpaper joint roller taped on the end of a stout cane. The mastic has completely covered the polythene to the edges. Looks like it might do the job.
If it still leaks then it's a new one.
__________________
History is much like an endless waltz: The three beats of war, peace and revolution continue on forever.
However history will change with my coronation - Mariemaia Khushrenada
