Teardrops n Tiny Travel Trailers

You can get this stuff @ Sutherland's for about $28 a gallon. It's cheaper in 5 gallon pails, but I only buy the 5 gallons when I'm doing my houseboat, as it tends to dry out and skin over if a partially residual amount is sealed up in a previously opened pail for any extended period of time. What I may do for this build is get three or four empty 1 gallon cans, buy a 5 gallon pail, and pour it into the cans so that I can use them as I need them.