So my daughter and family live in a house with a finished family room in the basement. The flooring is carpet laid on cement. One of their cats has insisted on urinating on a large area of the carpet since they moved there, about 4 years ago. They spent a lot of money getting it cleaned with some sort of enzyme process. It killed the odor for a while but it came back. It is really offensive. So I agreed to help them take out the carpet and replace it with some sort of vinyl or engineered wood. My question is how to handle the cement. I am sure the urine has soaked all the way to the cement. If we clean it with vinegar, will that be sufficient? Do I need to seal the cement with Kilz or a similar product? Any advice would be appreciated. I want to do this job once and be done with the smell. Thanks jared