Okiemommy, yes, I was thinking about Kilzs.
I use it for doing drywall water damage jobs.
Thanks for your reply about your coop.
I will probably two coat the edge and few inches around them.
I will probably end up using Kilz and then keep watch on Craigslist for barn siding. I got a bunch free...
We used OSB on our coop and primed it with Kilz 2. There are several people on here who have done the same thing, and have coops that have lasted years. Our OSB doesn't show any signs of softening, as we covered every possible inch of it that could be exposed. It was only meant to be temporary...