A substitute for Hardwood Floor Refinishing. When purchasing a hardwood floor, lots of attention is paid to what kind of floor materials, color, finish and a variety of other elements of hardwood floors as well as their effect on your home. Hardly any guidance are given on how exactly to correctly care for your hardwood floors when they are installed. Hardwood floors are treated with a polyurethane sealant giving wood flooring their sheen, protection and overall durability. The finish of the floors will last around 3 years, At some point, the floors will start to dull. It is because very small airborne dirt and dust are constantly being ground into the finish.