---
product_id: 23682665
title: "Nano+Poly Wood Sealer and Waterproofer, Clear, 1 Gallon | With Polyurethane, Water-based, Low-VOC, Waterproofer & Stain, For Decks, Fences & Log Homes"
brand: "seal-once"
price: "€ 136.90"
currency: EUR
in_stock: true
category: "Seal Once"
url: https://www.desertcart.hr/products/23682665-nano-poly-wood-sealer-and-waterproofer-clear-1-gallon-polyurethane
store_origin: HR
region: Croatia
---

# Fast-drying, flexible, breathable waterproof barrier Ultra-low VOC, eco-friendly & safe for plants and pets Water-based polyurethane for deep wood protection Nano+Poly Wood Sealer and Waterproofer, Clear, 1 Gallon | With Polyurethane, Water-based, Low-VOC, Waterproofer & Stain, For Decks, Fences & Log Homes

**Brand:** seal-once
**Price:** € 136.90
**Availability:** ✅ In Stock

## Summary

> 💪 Seal your wood’s future with Nano+Poly power!

## Quick Answers

- **What is this?** Nano+Poly Wood Sealer and Waterproofer, Clear, 1 Gallon | With Polyurethane, Water-based, Low-VOC, Waterproofer & Stain, For Decks, Fences & Log Homes by seal-once
- **How much does it cost?** € 136.90 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/23682665-nano-poly-wood-sealer-and-waterproofer-clear-1-gallon-polyurethane)

## Best For

- seal-once enthusiasts

## Why This Product

- Trusted seal-once brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Eco-Smart & Low-Odor:** Water-based formula with ultra-low VOC keeps your outdoor spaces fresh and safe for family and environment.
- • **Versatile Outdoor Armor:** Ideal for decks, fences, log homes, and outdoor furniture, enhancing longevity in high-traffic, weather-exposed areas.
- • **UV-Stable & Flexible Finish:** Protects wood from sun damage while allowing natural aging, maintaining beauty without cracking or peeling.
- • **Deep Penetration, Lasting Shield:** Unlike surface-only sealers, Nano+Poly penetrates wood fibers for superior water resistance and durability.
- • **Effortless Application & Cleanup:** Fast-drying liquid cleans up easily with soap and water—no harsh chemicals or oily residues.

## Overview

SEAL-ONCE Nano+Poly Wood Sealer is a premium water-based polyurethane formula designed to deeply penetrate and waterproof wood surfaces. With ultra-low VOCs and a fast-drying, UV-stable finish, it offers durable protection for decks, fences, and log homes while being safe for pets, plants, and people. This clear sealer enhances wood longevity by creating a flexible, breathable barrier that resists wear, weather, and water damage—all with easy soap-and-water cleanup.

## Description

Buy SEAL-ONCE Nano+Poly Clear Penetrating Wood Sealer with Polyurethane - 1 Gallon. Water-Based, Low-VOC, waterproofer & Stain for Decks, Fences & Log Homes.: Everything Else - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

## Features

- WATER-BASED POLYURETHANE WOOD FINISH: Our sealant provides top-notch protection against wear and tear in high traffic areas. It's odorless and ideal for use on wood siding, log homes, swing sets, outdoor furniture, wooden deck and fence, and more.
- WOOD SEALANT: Unlike many sealers that only form a topcoat, our protector penetrates below the surface to create a long-lasting, water-resistant shield around the wood. It helps protect against the elements.
- FLOOR SEALER APPLICATOR: Our premium gloss is ultra-low VOC and great for enhancing the extended life of your exterior flooring. The sealant can be safely applied around your home, landscaping, vegetation, or over any water area.
- WATERPROOF SEALER: Ditch the oil-based sealers and choose a UV-stable coating option. Our fast-drying liquid creates a flexible, breathable barrier and provides a no-fuss, easy clean-up with soap and water, as it allows the wood to grey naturally.
- SEAL-ONCE: Our user-friendly wood sealers and stains are an effective way to protect your lumber or concrete against water damage. When you use Seal-Once, you have the satisfaction of knowing our products will not harm pets, plants, or people.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B015C8AC1Q |
| Best Sellers Rank | #6,242 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #47 in Hardware Sealers |
| Brand Name | Seal-Once |
| Color | Clear |
| Compatible Material | Wood |
| Customer Reviews | 4.3 4.3 out of 5 stars (1,485) |
| Item Dimensions | 7 x 7 x 9 inches |
| Item Form | Liquid |
| Item Weight | 8.7 Pounds |
| Manufacturer | U-C Coatings |
| Material Type | Wood |
| Model | SOP 500G |
| Number of Items | 1 |
| Part Number | SO7500 |
| Style Name | Protection |
| Surface Recommendation | Floor,Furniture,Siding,Wood |
| UPC | 854734005042 |
| Unit Count | 128 Fluid Ounces |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Seal-Once
- **Item Weight:** 8.7 Pounds
- **Item dimensions L x W x H:** 7 x 7 x 9 inches
- **Material:** Wood
- **Style:** Protection

## Images

![Nano+Poly Wood Sealer and Waterproofer, Clear, 1 Gallon | With Polyurethane, Water-based, Low-VOC, Waterproofer & Stain, For Decks, Fences & Log Homes - Image 1](https://m.media-amazon.com/images/I/81wAqrTQlgL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Questions & Answers

**Q: do you need to sand the wood first to make it smooth before applying the sealer?**
A: Sanding exterior wood "smooth" is a very bad idea.  Exterior wood needs to be sanded to open up the pores of the wood for deeper penetration. Sand with 80 grit sandpaper, nothing finer. Most times, cleaning with Seal-Once All Wood Cleaner would be a better choice. It would also depend on the type of wood and the project.......... siding or deck, exterior furniture? Call us.

**Q: What is the difference in the Nano+Poly and the Marine?**
A: I believe that the marina stain is has a special formula for freshwater and saltwater

**Q: Should i use wood putty/filler before sealing or after sealing by seal-once nano+poly?**
A: Use a top-quality name-brand stainable/paintable outdoor (or interior-exterior) wood filler of genuine wood fibers that will provide expansion and contraction with the surrounding wood. Fill no more than 1/8th to 1/4” per layered application until flush with the surrounding surface--allow ample time for each layer to cure. Sand top layer flush. If choosing to stain, do so next to match if surrounding hue. After the final stain coat dries, apply 1-3 liberal coats of wood hardener, allowing it to dry between each application. If panting, skip stain and then paint over the top coat of dried wood hardener. It should last for the life of the wood in most cases.

**Q: Can this be applied with a sprayer?  thanks**
A: Yes, but you must immediately back brush.   Brush the area that you just sprayed. Apply the second coat while the first coat is still wet.  Within 5-15 minutes.

## Frequently Bought Together

- Seal-Once Nano+Poly Penetrating Wood Sealer with Polyurethane - Premium Waterproof Sealant -1 Gallon & Clear
- Pro Grade, Paint Brushes, 5-Piece, Paint Brush Set: Flat & Angle Brushes for Latex and Oil Paints, Stains, Interior & Exterior Home Improvement
- Double Thick Chip Paint Brush - Wood Stain Brushes for Painting Walls and Fence Staining - Wooden Handle Masonry Paintbrush for Varnish, Paste, Gesso and Limewash (4 inch)

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**Shop now:** [https://www.desertcart.hr/products/23682665-nano-poly-wood-sealer-and-waterproofer-clear-1-gallon-polyurethane](https://www.desertcart.hr/products/23682665-nano-poly-wood-sealer-and-waterproofer-clear-1-gallon-polyurethane)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-06-24*