BEESWAX!!!!!!!!!!!!!!!, Vern, thats all i use on my canteens, I pick it up here from a woman at Monroe, but can be had on ebay also for a reasonable price if you shop a bit, I use it mainly because it's an easy fix for anyone who purchases one of my canteens to do at home and not have to order pitch, a quick hint, do not hand that canteen in direct sun lite without having water in it.