What is the best sealant for RV?
Best RV Caulks
Dicor 501LSW-1 Self-Leveling Lap Sealant. ...
AP Products 017-90891 Sealant. ...
Geocel 28127V Pro Flex RV Flexible Sealant. ...
Alpha Systems 1021 Self-Leveling RV Sealant. ...
Gray Tremco Vulkem 116 Caulk. ...
Pro Flex Super Flexible Elastomeric Sealant. ...
Gorilla Silicone Sealant Caulk. ...
EternaBond RSW-2-50 RoofSeal Sealant Tape.
https://www.smartrving.net/best-rv-caulks/
Silicone has a tendency to turn yellow and peel off or you can't get it completely off, could go either way.
If I am putting something new on my RV, I use the butyl tape. One roll of that stuff will last you forever. One of the negatives I found is where to store the stuff as it needs to be stored flat with nothing on top. I also keep what's left of a roll of eternabond tape around plus a short roll of Flex Tape for those emergencies when you need to stop a leak or something.