Wood Floor Stain - When staining wood, it is very important to remove all surface defects prior to applying the stain. Even small imperfections will be magnified after stain is applied. That's because stains are designed to penetrate the wood surface. Paint, on the other hand, builds a color coat on the surface that hides whatever is beneath.

The initial application of paint or wood stain is absorbed into the substrate. Since stains contain low amounts of binder, the pigment remains near the surface, while the binder penetrates to a deeper level. On the other hand, paint has a high amount of binder, so the pigment forms a layer on the surface.

Wood stains range from very low viscosity to extremely thick. The thicker stains are designed primarily for exterior use. They penetrate better than paint, but usually do not hide surface defects as well. Exterior stains tend to be more flexible than paint and last longer. If you decide to use stain, be aware that most cannot be painted over. So once a surface has been stained, that’s most likely how it will have to stay for life.