An Alternative to Hardwood Floor Refinishing. When selecting a hardwood floor, a lot of attention is given to what kind of flooring materials, coloring, finish and a variety of other aspects of hardwood floors as well as their effect on your house. Hardly any instructions are given on how exactly to correctly look after your hardwood floors once they are installed. Hardwood floors are treated with a polyurethane sealant giving wood floor surfaces their sheen, protection as well as overall resilience. The finish of the floor will last around three years, Gradually, the floors will dull. The reason being very small dirt and dust are constantly being ground into the finish.