"Next to prayer, fishing is the most personal relationship of man" Herbert Hoover
"American by Birth, Southern by the Grace of God"Lewis Grizzard
2016 GMC Denali 3500Dually--2017 CC 36CKTS
Just to update for future readers. The Geocell proflex RV sealant was some good stuff, definitely the right product for the job. I pulled the old gutter spouts and cleaned up all the silicone sealant with a plastic scraper and mineral spirits which worked well. I noticed the silicone did not adhere well to the plastics. One clean I put a shot of geocell in the opening they’d put the new spout. I taped off the edges and caulked it in real nice. While I had a fresh tube I touched up any areas that looked thin on any of the outdoor accessories like speakers, railings etc.
Then I noticed the sealant where the rubber roof membrane folds under the gutter rail looked spotty and thin. I taped off the gutter and used some Dicor lap sealant to run a fresh bead. Looks great.
Just fyi for future readers, the geocell pro caulk specifically says not to use on rubber roof membranes.