My buddy runs a small security camera install gig down in Clear Lake and he learned the same lesson the hard way. He skipped the silicone on a few exterior runs because he was in a rush and figured the gaskets would handle it. About six months later he started getting flaky signals on two of the cams and pulled his hair out trying to figure out why. Turned out moisture had crept into the connections and corroded the pins, and he had to redo the whole run on a Saturday he'd rather have spent fishing. So yeah, that Houston air finds a way in no matter how sealed you think things are, lol.