Seal Once has been leading the innovation in the use of nanotechnology to create long-lasting, non-toxic wood sealers and tinted wood stains. Our New and Improved NANO plus POLY Penetrating Wood Sealer provides superior protection against water damage, mold, decay and eliminates warping and cupping. Unlike most top-coat sealers, NANO plus POLY deeply penetrates the surface of wood, using proprietary nanotechnology to form a flexible breathable barrier, that coats the wood fibers at the cellular level. This water-based wood protector combines proprietary nanotechnology with the strength of polyurethane to provide 360° of protection. With the added poly in this formula, it also creates a durable surface-coating, that protects against wear and tear in high traffic areas, making it a great choice for wood decks and walkways. NANO plus POLY is a water-based, eco-safe sealer that goes on milky white and dries clear. It creates a UV-stable coating that preserves the natural color of the wood and helps resist weathering and decay. It allows wood to age naturally without decay is non-film forming and will not alter the natural beauty of the wood. NANO plus POLY is Ultra-low VOC, making it compliant in all 50-states. Available in ready to use Black, Bronze Cedar, Brown, Cedar, Light Brown, Mahogany, Natural and Redwood. Recommended Applications Decks Railings Wood siding Log homes Thermally modified wood Docks Piers Fences Exposed beams Outdoor furniture Planters Play Structures.