 a concrete cap around the chimney. Those are all normal. I don't necessarily think that putting a sealer on is going to have that much of a major effect of slowing down any further deterioration. I think it's just sort of wear and tear. Okay. And so if it's not vapor permeable, it could even harm it. That's correct. Exactly right, Lisa. So I should ask the mason then if it's, you know, but he could tell me anything. He could say, yeah, it is.