: I am building a "Guillemot" kayak. And i am wondering how much
: epoxy i have to buy? I do not want to buy to little of the epoxy...

Buy a couple of gallons! I mean, hey, you're going to build another, and it really doesn't go bad that fast (judging by other posts). If it goes cloudy or colors but still sets-up fine, you can use it on the inside of the next one (for you, your SO, brother, sister, etc). ;-)

Later,
Tim.