Calling all Blackjack #57 experts -or what could I use to seal this?

[Mims]

Do you think I could use BJ on this to seal it? Thinking of turning it into a double quail coop in my barn, if I can find a way to seal it. He's giving it away.

 

[Sonya9]

Yeah I would use BJ on the "floor" part of the boards.

You will probably need to go over the wood with a rough sandpaper so the BJ can adhere to it properly though, I wouldn't expect it to stick well to a smooth varnished surface. I would probably seal the rest of it with a good waterproof finish first so the whole thing can be hosed out.