Seal-Once Nano+Poly Penetrating Wood Sealer - Premium Water-Based Sealant (1 Gallon) Cedar

Protect and Preserve Outdoor Wood with Seal-Once Nano+Poly

Seal-Once Nano+Poly is a water-based polyurethane wood finish designed to shield high-traffic outdoor surfaces without changing their natural look. The formula dries odorless and offers a lightweight, breathable layer that helps surfaces endure rain, sun, and daily wear.

Unlike many sealers that sit on the surface, Nano+Poly penetrates below the wood’s surface to create a long-lasting, water-resistant shield. This deep protection is paired with UV stability and flexibility, helping surfaces resist moisture while retaining a natural patina as the years pass.

Ideal for a wide range of exterior wood projects, including wood siding, log homes, swing sets, outdoor furniture, decks, and fences, the product balances performance with ease of use. The ultra-low VOC formula cleans up with soap and water and supports a straightforward maintenance routine.

Key benefits you may experience include: deep penetration that fortifies the wood from within, a breathable film that accommodates natural movement, and a finish that dries quickly for ongoing outdoor work. The formula is designed to be safer around homes and greenery when used as directed, offering peace of mind for households with pets and plants.

Why choose this sealer? It combines protection with practical use cases, providing a practical option for preserving wood integrity while allowing the surface to weather gracefully over time.

Typical uses

• Wood siding
• Log homes
• Decks and fences
• Outdoor furniture and swing sets
• Garden structures and other exterior wood

How it works and how to apply

• Penetrates wood to create a water resistant shield
• Water-based and UV-stable with a breathable, flexible film
• Easy cleanup with soap and water
• Wood may gray naturally; reapply to refresh color or protection

For best results, follow the product directions for surface preparation and reapplication. This sealer is designed to be user-friendly for both DIY enthusiasts and professionals.