Drip Rail Sealer

Although we did not try the 3M products, we did both SEM and the Norton I mentioned above. To me the SEM was not as smooth, so much that I scraped it back out. Given the results of the Norton as shown above, that's now my go-to. And if your drip rail has a folded hem at the top, I would suggest a slight initial coat that you can take a body spreader to wipe it up to enclose that seam, and then add another coat after it sets to make things smooth and pretty. The U-shape cut into the spreader I show above played a large part in getting that nice look in the drip rails, but before starting make sure you have clearance to travel the entire drip rail in a dry run.. (lessons learned) Any tight spot will stop the spreader in its tracks...
 
3M 08308 epoxy seam sealer.
I started out by doing the underside where the gutter meets the body. Masked it and cut an old spreader up to have 3 different corners to fit in at the different profiles along the way.


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For the gutters, the seam is about 1/4" from the bottom. I had barely enough room to get tape under the seam, but the fineline tape got in there using a tile hold down wedge. These things are handy as all get out. I threw half dozen in each toolbox after tiling the house. The point was used to push the tape into the gutter and press the tape down. Then turned it flat to schmooze the sealer into the seam.



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Update.
I schmoozed some into a dirty stainless steel channel I had laying around. Pulled it out today. It's quite firm, pliable of course, but pretty stiff.
I took the piece to the belt sander and it sanded real nice. I ended up hitting the gutter sealer with epoxy primer and skimmed over the epoxy primer with a bit of filler.


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