Zinsser 821 Sanding Sealer, Clear, Liquid, 1 gal (Pack of 2)

Penetrates wood pores deeply to seal and protect wood. Use as a pre-stain conditioner for all wood stains. Compatible with all clear finishes, including oil- and water-based polyurethane, lacquer and shellac. Can be used on new wood or over existing finishes. Use in SCAQMD regulated areas. Tough, non-yellowing finish. Covers approximately 400 to 600 sq-ft per gal depending on application method and surface.