hi.
i got a third coat in today, then ran out of caulk. it *looks* like it could use another coat, but, putting my hand up against it, i no longer feel a draft. so i'm content to leave it like that, but the truth is that i don't really know if it's enough. i'll check again tonight when the temperature comes down a bit, but it really seems tight. clearly, the gap was pretty deep to need three coats and still look like it needs more. but i think you can take your caulking gun back when you want.
j