Which adhesive caulk for solar panel mounts??
My CW has Sikaflex in 221, 505 and 715. Which one is best to mount solar mounts to thin fiberglass roof along with screws?
Forum Discussion
Lowes has 3M 5200 marine adhesive caulk in a red tube and I see online most are in a blue. They do say Marine 5200, wonder what the difference is?
