Thanks for the information JackE., That is what I am going to use. Like you I don't want the walls dark, so I am going to paint them with a water base white enamel.
Do you use a regular paint roller like you use to paint walls to roll the Blackjack #57 on the floor of the chicken coop? I would like to know how thick you should put it down? My coop is 12 x 16. Any info is appreciated since this is my first time having chickens.