Checkout my home made slideout drip rails.
So, I had an issue with water getting in around the 13' main slide which caused minor damage to the plywood floor. I traced the leak (at least I hope I did) back to the upper bulb seal and damaged mo...
Forum Discussion
I would have sandwiched some "metal building tape" between the drip rail and the body. Make it much more wind resistant and leak proof to boot. You could almost skip the caulking. Have you considered painting to match the body colour?
