Originally Posted by THEPILL
Yes if you go back to my thread,..there s a black band of sealant around the edges that Airstream applies to deter moisture.
Shane, I have the same black sealant on the top of the boards running from the outer edges about 8" inward. It is applied very
thinly and lots of areas are left bare. If water runs any further in, or settles in the places where there are bare spots, it does no good.
But my question was about cut edges. Edges suck a lot of sealant and have to be done carefully. Whoever applied the sealant to the top of the plywood was not careful at all. Cut edges are important because any sealant applied to a board's surface by the manufacturer doesn't help when someone cuts the board.
The same problem exists with the aluminum panels. When they cut them, they appear not to put any clear coat on the edges and that's where corrosion starts.