Le Tonkinois Bio-Impression Linseed Oil Varnish Primer. A deep penetrating sealer for use on bare wood. Especially useful on weathered or damaged surfaces that might reject varnish, but is effective in all applications. Produces a very pleasing light brown color. Although designed for use as a primer, not a permanent finish, it can be used as the final finish on interior applications when a matte finish is desired. 1.2 liter can.