I had to repair both my hulls over a two year period. Wouldn't you know, as soon as I repaired one hull, the next year the other delaminates! Luckily, I had bought a quart of marine epoxy. It was enought for two jobs. So, with that experience, I would say a two foot long delamination will take about a pint of epoxy. Buy more than you need. It is better to have too much, than not to have enough to finish your job.