Let's get to the bottom of this. When using RUst-Oleum Varathane Stain and Polyurethane over a soft wood surface, like pine, fir, or maple, we do recommend using a wood conditioner to help ensure an even finish. Please keep in mind that we do not recommend this product for use on floor surfaces since the coating cures to a hard finish and it will crack as the wood floor moves and flexes.