Help, does anybody know what this stuff is made of? Our kitchen wall is covered with Nu Econo Brick. My husband just cut through it to put in a door, and filled the house with a terrible smell. I went and looked at the package of leftover bricks that was in the garage when we moved in and it says 100% fire proof. Now I'm wondering if it's asbestos? Did we just coat our whole house with asbestos dust? If so, what do we do?