 Those are breathable. They can be sprayed with a tank sprayer, so you clean it, and then a tank sprayer, you just mist it on. It penetrates into the concrete. You don't let it puddle, otherwise it'll create a glossy film. If you want to take a look at this website, I've sent a lot of people there. It's a high-end sealer. It's called masonrydefender.com.