Fast drying sealers are more difficult to use since it is easy to form lap marks or a splotchy appearance. Therefore, they are usually applied only by experienced professionals. Surface Finishes which are relatively easy to apply will give satisfactory service and include polyurethane, varnish, shellac, lacquer and some others. The polyurethane is the most popular surface finish today because of their high resistance to moisture, mechanical wear, stains and spills. They are available with a high gloss or matte finish.
Polyurethanes are either oil modified or moisture-cured.
The oil modified types are the easiest to apply. Varnishes can also give satisfactory performance. However, varnishes do have a greater tendency to scratch, and worn spots are difficult to patch without showing lines between the old and new finish. Varnishes specifically designated for floors tend to be more durable. A glossy or matte finish is available.