I had carpet in my master bedroom that was 12 years old and had gone through 2 puppies being house broken. Even after steam cleaning, there were still stains and smell. I bought tile to replace the carpet, and some oil-based Kilz to coat the particle board flooring. I pulled the carpet today and found dead mold on the wood where the washer had overflowed and flooded about a 10 sq ft area. I scraped off the mold and assessed the rest of the floor and found only a couple of spots where dog urine had gone through both the carpet and the padding. I'm putting down 1/2" cement board, then the 3/8" tile over the wood floor. What will the Kilz do for me? Is it necessary to protect against odor or is it going to be overkill?