---
product_id: 12191199
title: "SEAL-ONCE MARINE - 1 Gallon Penetrating Wood Sealer, Waterproofer & Stain. Water-Based, Ultra-low VOC formula for high-moisture areas to protect wood docks, decks, piers & retaining walls."
brand: "seal-once"
price: "€ 281.37"
currency: EUR
in_stock: true
reviews_count: 13
category: "Seal Once"
url: https://www.desertcart.sk/products/12191199-seal-once-marine-1-gallon-penetrating-wood-sealer-waterproofer-stain
store_origin: SK
region: Slovakia
---

# UV-stable for sun & saltwater defense Waterproof barrier up to 300 sq ft Ultra-low VOC, eco-friendly formula SEAL-ONCE MARINE - 1 Gallon Penetrating Wood Sealer, Waterproofer & Stain. Water-Based, Ultra-low VOC formula for high-moisture areas to protect wood docks, decks, piers & retaining walls.

**Brand:** seal-once
**Price:** € 281.37
**Availability:** ✅ In Stock

## Summary

> 🌊 Seal the deal on lasting wood protection—because your outdoor space deserves the best!

## Quick Answers

- **What is this?** SEAL-ONCE MARINE - 1 Gallon Penetrating Wood Sealer, Waterproofer & Stain. Water-Based, Ultra-low VOC formula for high-moisture areas to protect wood docks, decks, piers & retaining walls. by seal-once
- **How much does it cost?** € 281.37 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/12191199-seal-once-marine-1-gallon-penetrating-wood-sealer-waterproofer-stain)

## 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

- • **Deep Penetration Seal:** Fast-drying liquid penetrates wood fibers at the cellular level for long-lasting, flexible protection.
- • **Eco-Conscious Formula:** Ultra-low VOC and safe for aquatic life—protect your outdoor spaces without compromising the planet.
- • **Versatile Outdoor Use:** Ideal for docks, decks, piers, retaining walls, and outdoor furniture—extend the life and natural beauty of your wood.
- • **Marine-Grade Protection:** Shield your wood from salt spray, rain, and harsh UV rays with a durable, water-resistant coating.
- • **Effortless Application & Cleanup:** Water-based formula glides on smoothly and cleans up easily with soap and water—no harsh chemicals needed.

## Overview

SEAL-ONCE MARINE is a 1-gallon, water-based penetrating wood sealer designed for high-moisture environments. Its ultra-low VOC formula creates a UV-stable, waterproof barrier that protects wood docks, decks, piers, and retaining walls from water damage and salt spray. Safe for aquatic life and easy to apply with soap-and-water cleanup, it covers up to 300 square feet and penetrates wood fibers deeply for long-lasting, flexible protection.

## Description

desertcart.com: SEAL-ONCE MARINE - 1 Gallon Penetrating Wood Sealer, Waterproofer & Stain. Water-Based, Ultra-low VOC formula for high-moisture areas to protect wood docks, decks, piers & retaining walls. : Sports & Outdoors

Review: Water beads up, consistent coverage, good stuff - Honestly, I didn’t know what to think. There are several negative reviews, several positive, which left me in a bit of a lurch. Do I risk it and potentially regret it, or will I be a lucky one? I went ahead and pulled the trigger and couldn’t be happier. I followed the directions to a “T”, bought the clear and then purchased the black tint separately. This stuff goes on like a dream. It’s is a bit watery, which the green painting tape didn’t completely guard against, but being water based made for pretty easy cleanup. I’ll try the upgraded paint block tape next time. We’ve had a hard rain today and this stuff had performed flawlessly. Water beads up and runs right off, the wood fibers seem very well protected/sealed, nothing to complain about as far as adhesion goes. Time will tell if it lives up to its stated duration. Honestly though, it goes on so easy and looks so good, I’m not opposed to having to reapply earlier if needed.
Review: Awesome product - this stuff is amazing. After sanding my porch steps, I treated them with this sealer. The wood was instantly sealed and the water just pearled. I prefer the natural wood look.

## Features

- MARINE SEALANT: Our liquid formula creates a UV-stable coating for protection against the elements, saltwater spray, and water damage. Marine is a great protector for outdoor furniture, thermally modified wood, and boat docks. Marine is safe for use over open water and is non-hazardous to aquatic life.
- DECK STAIN: It's water-based, ultra-low VOC, great for enhancing the extended life of your flooring, siding, and porch. The paint forms a water-resistant shield around wood fibers at the cellular level to help preserve the natural color.
- WATERPROOF WOOD SEALER: The wood used on boat docks, decks, and retaining walls near rivers, lakes, oceans, and ponds is subjected to constant moisture. We crafted a sealer, remove stain, and finish all in one, specifically for these installations.
- WOOD SEALANT: Our fast-drying protector penetrates wood below the surface, coating the wood fibers at the cellular level, which creates a long-lasting, flexible, breathable barrier. It provides a no-fuss, easy clean-up with soap and water.
- 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 | B00EQ89RYW |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #7,361 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #25 in Household Stains |
| Brand | Seal-Once |
| Color | Clear |
| Coverage | 300 square feet |
| Customer Reviews | 4.3 4.3 out of 5 stars (2,315) |
| Date First Available | August 23, 2013 |
| Finish | Liquid |
| Included Components | SEAL-ONCE MARINE - 1 Gallon Penetrating Wood Sealer, Waterproofer & Stain. Water |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid |
| Item Package Quantity | 1 |
| Item Weight | 8.8 pounds |
| Item dimensions L x W x H | 12 x 12 x 12 inches |
| Item model number | 7614 |
| Manufacturer | New Image Coatings, LLC |
| Material | Polyurethane |
| Number of Items | 1 |
| Part Number | 7614 |
| Product Dimensions | 12 x 12 x 12 inches |
| Size | 1 Gallon |
| Style | Outdoor |
| Surface Recommendation | Walls,Wood |
| UPC | 850336001024 |
| Unit Count | 128.0 Fluid Ounces |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Seal-Once
- **Item Weight:** 8.8 Pounds
- **Item dimensions L x W x H:** 12 x 12 x 12 inches
- **Material:** Polyurethane
- **Style:** Outdoor

## Images

![SEAL-ONCE MARINE - 1 Gallon Penetrating Wood Sealer, Waterproofer & Stain. Water-Based, Ultra-low VOC formula for high-moisture areas to protect wood docks, decks, piers & retaining walls. - Image 1](https://m.media-amazon.com/images/I/71meKazl2vL.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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Water beads up, consistent coverage, good stuff
*by T***E on April 30, 2024*

Honestly, I didn’t know what to think. There are several negative reviews, several positive, which left me in a bit of a lurch. Do I risk it and potentially regret it, or will I be a lucky one? I went ahead and pulled the trigger and couldn’t be happier. I followed the directions to a “T”, bought the clear and then purchased the black tint separately. This stuff goes on like a dream. It’s is a bit watery, which the green painting tape didn’t completely guard against, but being water based made for pretty easy cleanup. I’ll try the upgraded paint block tape next time. We’ve had a hard rain today and this stuff had performed flawlessly. Water beads up and runs right off, the wood fibers seem very well protected/sealed, nothing to complain about as far as adhesion goes. Time will tell if it lives up to its stated duration. Honestly though, it goes on so easy and looks so good, I’m not opposed to having to reapply earlier if needed.

### ⭐⭐⭐⭐⭐ Awesome product
*by I***L on February 11, 2026*

this stuff is amazing. After sanding my porch steps, I treated them with this sealer. The wood was instantly sealed and the water just pearled. I prefer the natural wood look.

### ⭐⭐⭐⭐⭐ READ and following the instructions
*by R***G on August 23, 2024*

All of my reviews are of things I buy for myself. I do not accept freebies or anything in exchange for my reviews. Period. The Marine stain-sealer works very good. It has good coverage, goes on easily and quickly and the result is long lasting and looks great. It's my go-to stain-sealer now. I use it on my decks instead of the nano type. I've read many of the reviews and throughout many of them the same theme comes up, lack of proper wood prep or not following instructions. Preoprly prepared wood and follwing instruction will provide you with one of the best stain and sealer applications of any product including the top tier name brands. The wood. If the wood isn't properly prepared then no matter what you put on it will fail prematurely. Putting any stain and selaer on new bought wood is a mistake unless you first clean it and sand it. The wood you buy often has a waxy coating on it and sometimes anti-mold agents put on it. If all you try to do is buy new wood for your deck or project and then just stain and seal it, it won't last. Clean the new wood first, it's easy and you can use a dilution of bleach, water and dawn dish soap. Use a deck brush to scrub the wood and then rinse it off real good. The let it dry for at least two days, 3 or 4 days if it's humid or not really warm outside. If you don't do this the stain and sealer will not take. Before you apply the stain-sealer, test for penetration. When you apply a small amount it should soak right into the wood. If it sits on top, it's not going to work, nothing else will either. If you are using it on a deck, sand it even after cleaning the boards. Then just before you sapply, wipe the boards with a damp clean rag. Do not rely on using an air compressor or brush to get the sanding dust off. The rag should be just damp, not soaking. Let the boards dry for a few minutes and then apply the stain-sealer. It should soak right into to wood. This coat should not be heavy, but rather a light to medium light coart. You should not see shine on the surface. If you do, that means the stain-sealer isn't penetrating and you didn't prepare the wood correctly. On a 16' typical deck board, start from one end and let it sit for about 5-10 minutes. Go back to where you started to put on the secnd coat. This will be a light coat and it might seem shiny for just a short time. Don't use a heavy coat or it will sit on top and come off ahwn it wears or water gets on it. Curing. Let it cure. 2 days is best. Planning for this time is essential. If you need to use the deck then do part of it and then block that area off. Rotate areas you can use vs areas that need to cure. When to apply. After the morning sun is up and temps are up. Applying stain-sealer while the air has a lot of humidity is bad practice. Same with trying to finish some boards late in the afternoon unless your area is still nice and warm with low humidity. Decks or docks near or over water. The air is full of humidity so only aply at the height of the warm part of the day. Many boards on docks have been previous treated with oily sealers. Sorry, you'll never get that stuff off the boards so your choice is to use a similar sealer because nothing else will hold up. So clean your dock boards really good. The problem is that anything you use to clean much be ok if it gets into the water or can drain into the water. That means if the wood was treated with any oily type selaer nothing you can use that is safe for the water will also take off the previous oily sealer. Use the right product for the job. Brushes. Amazingly, some of the cheap synthetic brushed worked far better than expensive name brand brushes. The more expensive brush load up too much sealer and that isn't what you want. You want the sealer to run off and out of the brush so you can control how much goes on the wood. Trying to spread the sealer using the brush is a waste of time and leads to a bad result. Light coats. Clean-up. Dawn dish soap applied directly to the brush on both sides and then just a little water to let it suds up. Work the brush in a stainless steel pan back and forth really good. The start rinsing. Keep rinsing until thre are no more suds and the water runs clear. SHake the brush and let dry. Do that and just slightly beding the bristles before next use is like a new brush. Prep, prep, prep. You only stain-seal once every few years, don't skimp on the prep.

## Frequently Bought Together

- Seal-Once Marine Premium Wood Sealer - Waterproof Sealant - Wood Stain and Sealer in One - 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
- Magimate Deck Brush for Applying Stain, 5-inch Paint Brush, Medium Size for Quick Decking, Fence, Walls and Furniture Paint Application, Handle Threaded for Extension Use, Multicolor

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-03-13*