Do it yourself

Dale, You seem to have so much experience, I hope you don't mind me pulling your knowledge again. The same house that we are putting the kitchen sink in, we put down a parquet floor. It looks beautiful! But, we have now found out we need to put a polyurethane sealer on top of it. Ok, how is this applied? How many coats? and how long do we wait between coats...the parquet is approximatel 720 square feet (3 bedrooms, hallway and living room) Thanks for your advice. Cindy