Sorry for the delayed answer JT... it doesn't state anything regarding safe for animals on the label or elsewhere. It's a roofing sealer after all... I went on the recommendation of others who have used it before me and had no problems (over YEARS of use). There's really nothing for the chickens to peck at/on... it dries "hard," just like any paint would... and it will be covered by bedding material which should keep their scratching and pecking interests occupied. It's water based, so easy clean up after application, and at 80 degrees, dried to a useable point in a couple of hours. There is minimal odor during application (I was worried about that so left the walls unfinished till after I applied it) and no odor at all after it dries.
I had a rainstorm pass through right after I finished applying it and ended up with a puddle of water on one side of the coop (before it had fully cured), and it did no damage at all... the water evaporated and the sealant hardened up just like the rest of the application area. No leak through any where. I have noticed that where a coop door scrapes it due to contact, it does wear through, but that would happen to anything... paint, linoleum, even tile over time... Just have to measure and cut then construct better to make sure there's no contact
So far, I'm 100% satisfied with the product and it has lived up to everything I've read about it when used in/for this particular application.