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
kaz442 wrote:
3M 4000UV it's a marine adhesive and caulk. It's made for bedding cleats and such on boats above and below water line. It's UV resistant and has a tensile strength of 500psi. They also make a 5200UV but that's overkill.
Good choice. I used 3M 4200 and it's also holding up well.
These 3M products are very adhesive, as well as good sealants. 3M 5200 is extremely strong.
AFAIK the other products, Dicor, Geocell, are less adhesive but also good sealants.
