Water-based polyurethane is fast drying, non-yellowing and has very little odor. It offers great durability and can give your floor an excellent look. The fact that the dry-time is fast makes it very difficult to apply without prior experience, but allows them to be easily coated twice in a day by a professional. If your floor has been sanded within a year or two these finishes are often used as only the top-coat to keep the cost down and still provide durability. Although they are often marketed as a “commercial finish,” they are becoming very popular for use in residential homes.