You are correct, it does not stich to silicone. I used 4" to cover 1/4" silicone bead and 1 1/2" dicore beads. 6" to cover Newmars 4" eturna bond tape on the front cap and rear raised roof cap. It may not stick to a small part in the middle but will never come off of the rest. It's very hard to work with. When it touches the roof it will not come off to reposition. A second person will make it alot easier.
2018 Dutch Star 4369 Spartan Chassis
2016 Jeep Cherokee, 1952 Willys CJ3A