That sounds a bit worse than mine. The eternabond does wrap the corner before the trim goes up. Also, it's better to predrill the holes in order to shoot some proflex in there before screwing. Use a #25 drill bit. Get a few from somewhere other than box store, like industrial supply house or a local machine shop might throw you a couple. They're cheap. If you were near me, I'd give you a couple if you came to my shop. Also, don't get screws over 1"long. They will hit the other wall of the box tubing and snap. Btw, I found the source of my leak by having my son spray the outer wall of the slide. Water began pouring out from the underside of the trim rail.
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