The property you are considering buying has the potential to make you a lot of money. Only it has one major problem, and this problem is the reason you are able to buy this property at such a bargain. The problem is odor, odor left behind by a host of pets.
Should you seal or paint the floors and walls to trap the odors? Will that solve the problem for you? Unfortunately, the answer is no.
Sealers are intended to block stains on walls from bleeding through and staining new paint applied to a wall. They are not designed to seal or block gases (odors) from escaping or passing through. Some-but not most-paints do produce a continuous membrane finish that is not gas permeable. Consider, however, that only one of many sides of an object like a piece of drywall or flooring is being painted, this approach offers limited odor control and success.
Both fire and tobacco smoke are exceptions. But even long-term contamination of walls and ceilings with tobacco smoke