---
product_id: 337696429
title: "- SEAL-ONCE Marine Ready Mix - 1 Gallon Penetrating Wood Sealer Waterproofer & Stain (Coastal Gray). Water-Based, Ultra-Low VOC Formula for high-Moisture Areas to Protect Wood Docks, Decks & Piers."
brand: "seal-once"
price: "$231.56"
currency: USD
in_stock: true
url: https://www.desertcart.us/products/337696429-seal-once-marine-ready-mix-1-gallon-penetrating-wood-sealer
store_origin: US
region: United States of America
---

# Water-based, ultra-low VOC Nanotech deep penetration Flexible, breathable barrier - SEAL-ONCE Marine Ready Mix - 1 Gallon Penetrating Wood Sealer Waterproofer & Stain (Coastal Gray). Water-Based, Ultra-Low VOC Formula for high-Moisture Areas to Protect Wood Docks, Decks & Piers.

**Brand:** seal-once
**Price:** $231.56
**Availability:** ✅ In Stock

## Summary

> 🛥️ Seal your wood with science — protect like a pro, look coastal cool!

## Quick Answers

- **What is this?** - SEAL-ONCE Marine Ready Mix - 1 Gallon Penetrating Wood Sealer Waterproofer & Stain (Coastal Gray). Water-Based, Ultra-Low VOC Formula for high-Moisture Areas to Protect Wood Docks, Decks & Piers. by seal-once
- **How much does it cost?** $231.56 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/337696429-seal-once-marine-ready-mix-1-gallon-penetrating-wood-sealer)

## 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 Formula:** Water-based and ultra-low VOC for a safe, non-toxic finish around people, pets, and the environment.
- • **Effortless Coverage:** One gallon covers up to 250 sq. ft., creating a flexible, breathable shield that stabilizes and enhances wood.
- • **Nanotechnology Power:** Penetrates wood fibers at the cellular level for unmatched durability and long-lasting protection.
- • **Marine-Grade Protection:** Specifically engineered for fresh & saltwater exposure—perfect for docks, decks, and piers.
- • **Oil-Like Performance, Zero Harm:** Delivers the strength of oil-based sealers without harmful chemicals or side effects.

## Overview

SEAL-ONCE Marine Ready Mix is a 1-gallon, water-based penetrating wood sealer and stain in Coastal Gray, designed for high-moisture environments like docks and piers. Featuring advanced nanotechnology, it deeply coats wood fibers to create a flexible, breathable barrier that protects and stabilizes wood without harmful chemicals. Ultra-low VOC and safe for people and pets, it covers up to 250 sq. ft. per gallon, delivering oil-based sealer performance with eco-friendly benefits.

## Description

Full description not available

## Features

- Specially Formulated to be Applied Around & Over Fresh or Salt Water
- Water-based, Low VOC; Safe for People, Pets, and around the elements
- Superior Nanotechnology Penetrates Deep, Coating Wood Fibers at the Cellular Level
- Performs like an Oil-Based Sealer Without any Harmful Chemicals or Side Effects
- Creates a Flexible, Breathable Barrier that Enhances, Stabilizes & Protects Wood

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Color | Coastal Gray |
| Brand | Seal-Once |
| Surface Recommendation | Decks, Wood |
| Material | Polyurethane |
| Model Name | Marine |
| Size | 1 Gallon |
| Coating Description | Water-based |
| Item dimensions L x W x H | 9 x 7 x 9 inches |
| Item Weight | 9 Pounds |
| Finish Type | Penetrating |
| Style | Outdoor |
| Liquid Volume | 1 Gallons |
| Paint Type | Water Based |
| Package Information | Jug |
| Warranty Type | Time-based warranty |
| Number of Items | 1 |
| Manufacturer | U C COATINGS |
| Unit Count | 128 Fluid Ounces |
| UPC | 759126905156 759126569426 |
| Part Number | SOMARINEWOOD |
| Item Weight | 9 pounds |
| Product Dimensions | 9 x 7 x 9 inches |
| Item model number | Marine |
| Finish | Penetrating |
| Coverage | covers up to 250 sq. ft. per gallon |
| Included Components | Outdoor Stain |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Color:** Coastal Gray
- **Brand:** Seal-Once
- **Surface Recommendation:** Decks, Wood
- **Material:** Polyurethane
- **Model Name:** Marine

## Images

![- SEAL-ONCE Marine Ready Mix - 1 Gallon Penetrating Wood Sealer Waterproofer & Stain (Coastal Gray). Water-Based, Ultra-Low VOC Formula for high-Moisture Areas to Protect Wood Docks, Decks & Piers. - Image 1](https://m.media-amazon.com/images/I/71h-LYfZNDL.jpg)

## Available Options

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

## Questions & Answers

**Q: Can it be used on green treated lumber**
A: Pressure treated lumber has to be dry.

**Q: Can you use a regular wood stain after applying?**
A: Yes the clear MARINE can be painted or stained.  Or you can purchase a tint for SEAL-ONCE and use the MARINE as a sealer and stain.

MARINE Features:
• Clear formula can be painted or stained after treatment
• Tinted formula provides additional UV protection
•  Available in 11 semi-transparent tint colors
• Eco-friendly, Non-toxic; will not harm pets, plants, people or marine life
• Ultra-low VOC, Water based
• Can be applied around or over fresh or salt water
• Flexible, breathable barrier, Stabilizes & protects wood
• Prevents warping, cupping, wood rot & decay
• Resistant to salt water spray
• Prevents mold, mildew & algae growth
• Soap and water cleanup

**Q: I want to use this on a 6x6 wood beam at the opening to my walk-in shower (floor to ceiling). No direct shower spray. Will this seal it?**
A: Yes you may use it for this specific application. As suggested in a comment down bellow, you would want to make sure that it is fully cured before using the shower. Typically it would take 48 hours to cure but it may take longer depending on the environment.

**Q: does this work for the interior of a sauna , safe to sit on?**
A: It dries to a hard, smooth finish, is non toxic and nice to look at.  Would be safe to sit on...other types of recreation may require caution.

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-27*