Rust-Oleum Varathane Sanding Sealer saves time and materials when finishing porous woods. This high-building solution dries clear and seals the wood to create a surface that can be easily sanded. Contributes to an ultra-smooth final finish. Universal sanding sealer works with all clear oil-based, water-based, shellac and lacquer finishes and is easy to sand for a smooth, even finish. For best results apply in direction of wood grain in smooth, level strokes. Apply thin, even coats.