 and there's a leak, and it gets down in between, and there's no way for it to dry or escape. So making that solid fill with a closed-cell foam, above-grade only would be where I'd be using it, and it would work very nicely. All right, so that's the concept behind that. There's open-cell foams that you would use, like, in different areas of the home, below-grade, maybe in a basement or something along those lines. That way we can control...