Crack in Aluminum?!!!

[Newell Attack]

I have developed a crack in the aluminum siding of my Newell. The crack runs from the upper corner of the entrance door towards the point where the roof meets the side. It looks to be just an inch or so shy of reaching the roof. My guess is that it's through traveling and is as long as it going to get. It's about 6 inches long, slightly jagged, and about an eighth of an inch wide. My concern is primarily the water damage that could occur if I don't address the problem. I know that to properly repair this I would have to reskin the entire side of the trailer, but that's not a real option for me. I'm looking to fix the problem without going to those lengths. One idea I've had is to tape the crack with Eternabond tape. It's permanant and paintable. Do you have any comments or suggestions? Thanks in advance.