SEAL-ONCE® NANO+POLYTM Premium Wood Sealer combines our proprietary nanotechnology formula with the strength of polyurethane to provide 360° of protection. Now available in Clear and Ready Mixed Colors! The NANO creates a durable finish that allows wood to expand & contract, while the POLY adds surface protection against wear & tear in high traffic areas.

Unlike many sealers that only form a top-coat, NANO+POLYTM penetrates below the surface to form a long-lasting, water-resistant shield around the wood fibers at the cellular level.  This penetrating protection from water intrusion helps resist wood rot, decay, mold & mildew.  It also stabilizes wood, eliminating warping & cupping.   It is a great investment to preserve old or new wood & extend its natural life for years.