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. Varnishes may be based on phenolic, alkyd, epoxy or polyurethane resins. Shellac and lacquer are sometimes used as floor finishes. These finishes will dry rapidly, and more than one coat can often be applied in the same day. However, shellac and lacquer are not as resistant to moisture, spills and mechanical wear as are the penetrating sealers, polyurethane and varnish.