I have a fireplace that I would like to cast over the "floor" with something. The material must withstand heat. Is it some kind of cement or concrete I should use? Where can you buy it?
The previous homeowner let their cats "do their business" in the fireplace so it stinks. We plan to tear it out and rebuild everything eventually, but can't afford it right now, so we want to cast something over it so it doesn't smell. :S Hence my questions!
