[kerneltugboat]

I order mine direct from Kroil, ends up costing about 110.00 bucks for a case of 12 with shipping, sometimes they have a sale and it is a little cheaper and you get the bigger cans. I usually split the case with my fishing friends. I have the small can and the spray cans, the stuff works great. I keep a can on my boat at all times. A friend of mine could not loosen the bolts on his trailer, he sprayed them overnight with Kroil and claims he was practically taking them off with his fingers the next day. It will be interesting to see if it helps with the tank fittings. It is supposed to get into one millionth of an inch.