A few of you might remember me replacing the slides and sealing the roadside slide-out last year. I thought the MEK/ABS slurry would work, but I still had numerous pinhole leaks that added up. I had a tube of Vulkem ready to throw away, so I cleaned the drip channel with MEK, rough sanded, cleaned again and coated the channel with Vulkem. We've had heavy rain up here, and I checked it every day, no leaks.
By the way the Rust Oleum "Bed liner" is junk for the interior, I'm going to bite the bullet and use POR-15.