 And when you put that sealer in, it just kind of fills up the capillaries, creating somewhat of a sealer, but it's a breathable sealer. And that's really the key if you're in climates where you can have hot and cold. You want something to breathe. You want to exhaust that moisture from underneath that slab out, but you want to minimize the amount of moisture that can come in. So there's still some transfer, but it's minimized. It'll stay longer.