For those with leaking issues, I immediately threw out the silicone that came with the kit. From building camper trailers, silicone is a big no no. If it leaks, you can’t just add more, you have to scrape off all the old and reapply since nothing, not even silicone, sticks to silicone.
I used Proflex RV sealant on mine and haven’t had a single drip from any seams. It urethane based too which means you can add more if you notice leaks, but you won’t because this stuff is the real deal.