I am converting a playhouse into a chicken coop. For the floor and walls, I am using form plywood and need to seal between these. The problem is that it's below freezing outside and is expected to stay that way for a while. The paint joint compounds I have looked at can withstand many degrees below freezing once dried but need to be kept frost-free beforehand. I don't want to use silicone as it can resemble ring-like worms if it comes loose. Does anyone have tips on what I can use to seal with?
