Seal-Once Nano Plus Poly Wood Sealer – 2 Gallon, Coastal Gray

Protect exterior lumber from moisture damage with a two-gallon container of Seal-Once Nano Plus Poly, a water-based penetrating wood sealer pre-mixed in Coastal Gray.

Deep Penetration and Weatherproof Shield

Unlike film-forming topcoats that trap moisture or chip when weather shifts, this UV-stable formula absorbs beneath the wood grain to form a flexible, breathable barrier. The transparent water-repellent layer blocks rain and humidity while allowing internal dampness to evaporate. This action preserves structural integrity and encourages wood to age into a consistent gray patina without cracking or flaking.

Non-Toxic Application and Easy Cleanup

Made as an ultra-low VOC, odorless liquid, the sealer removes hazardous solvent fumes from your project site. You can apply it directly to wood siding, log structures, swing sets, outdoor furniture, decks, and fences without damaging adjacent soil, plant beds, ponds, or wildlife. When you are finished, brushes and rollers rinse clean with standard soap and warm water.

Performance Specifications

• Premium gloss finish that survives abrasion in high-traffic zones while revealing underlying wood grain.
• Semi-transparent Coastal Gray tint that conditions weathered timber and matches available blends including Black, Bronze Cedar, Brown, Cedar, Light Brown, Mahogany, Natural, and Redwood.
• Built-in manufacturer coverage guaranteeing resistance to water accumulation for ten years on vertical surfaces and six years on horizontal installations.

This two-gallon supply replaces traditional oil-based coatings, delivering rapid drying times and straightforward brush or roller application for large exterior footprints.