On Wednesday, March 14, 2018 at 1:22:11 PM UTC-4, Jonathan St. Cloud wrote:
My trailer arrived with two soft solar chargers attached to the roof top via a sort of caulk/goop. Two years later the trailer is leaking under the solar panels. Looking for a recommendation for a goop or caulk that is white or clear, and can withstand the sun and heat of the Western USA flying spots?

Sikaflex is usually the "gold standard" in the RV industry. Any exterior penetration gets sealed with Sikaflex. Excellent caulk.