Quad or vualkm are the only two you should use
http://www.sssales.com/tremco-vulkem-116-gray-10oz-tube
I’m partial to RV ProFlex for vertical surfaces. If you really need a permanent seal, try 3M 5200. Buy the smaller tubes you can squeeze by hand, they produce a much better bead than tubes in a caulk gun.
Need some help with finding the right clear sealant for my fiberglass trailer along the metal trim. I’ve tried Dicor non-sag cap sealant but found it set up too hard and pulled away. I moved to Dynaflex 230, which isn’t silicone but silicone-like. It had better flexibility but is pulling off the trim in this pic. I probably could reapply , getting more surface area of the metal next time. Kind of a weird season to apply this kinda stuff in SoCal, 80 during the day and 40 at night. Any help would be appreciated.
Source: Sealant for fiberglass to metal trim, more details in the comments.
