Thompson’s WaterSeal Deck Sealer Transparent Waterproofing Stain Review 

 January 16, 2021

By  Dale Keese

There really is nothing quite like the character that a wooden deck can bring to your home, providing the perfect location for enjoying outdoor living. But water damage means saying goodbye to the elegance of smooth, solid wood decks beneath your feet. 

Water is extremely damaging to wooden decks. Considering that it’s outside your home, snow and pounding rain can take a serious toll on the beauty and integrity of your deck. 

Thompson Deck Sealer Transparent Stain

Source: thompsonswaterseal.com

That’s why having solid wood in your deck requires care and maintenance especially if you want to preserve its natural color. Staining and sealing your wood becomes necessary for preventing water damage while retaining the wood’s natural beauty and allowing its grain to shine. 

When you look at the options for strains and sealers in the market, it can become overwhelming. With dozens of top-rated products, how do you choose?

There’s one thing that homeowners in the know trust: Thompson’s WaterSeal Waterproofing Stain. It’s a wood stain and sealer all in one formula, designed to protect your beloved wooden deck from the harmful damage that water can cause. This awesome two-in-one product is a must-have for everyone who has a deck; it will save you countless hours in maintenance while providing your deck with unbeatable protection from water.

Worrying about water damage will be a thing of the past once you start using Thompson’s WaterSeal Waterproofing Stain. Since it’s transparent, applying it will allow your wooden deck to show off its true natural beauty without being masked by paint. This stain and sealer can be applied to both dry or damp wood, as long as it’s been cleaned beforehand. 

But a beautiful deck means nothing if it’s been affected by mildew. The good news is, Thompson’s WaterSeal Waterproofing Stain also resists mildew!

This is such a highly functional wood stain and sealer that it would be a mistake not to use it. It does a superior job for protecting wood against water and mildew, as well as ultraviolet damage thanks to its formulation that contains advanced polymers. Anyone with a deck can attest to the harsh, color-fading power of ultraviolet rays. Don’t wait until the last minute to preserve your wood’s color. 

Aside from decks, Thompson’s WaterSeal Waterproofing Stain can also be used on other types of exterior wood furniture such as fences and sidings. That’s even more proof of this product’s incredible versatility! Keep your valuable outdoor wooden furniture waterproof for months at a time.

Comprehensive Protection

Thompson’s WaterSeal Waterproofing Stain is the only product you need for thorough and comprehensive protection for your wood deck. It provides you with efficient defense against water damage, mildew, and ultraviolet rays.

Once you apply this sealer, trust us, your deck will be so beautiful you’ll hardly be able to wait to use it for your next barbecue. 

You’ll also be glad to know that this product is affordable. It’s like buying a stain and a waterproof sealer at a bargain price.

How To Use Thompson’s WaterSeal Waterproofing Stain

Applying Thompson’s WaterSeal Waterproofing Stain is easy and simple, but keep a few things in mind. For one, don’t apply it on extremely hot days or underneath direct sunlight. Air and surface temperatures should ideally be below 95F and above 50F. 

Next, you’ll have to do a splash test. This entails sprinkling some water on different parts of the wood surface. If you notice that water absorbs and that it results in a darker color after five seconds, that means that the surface is porous. This is an indication that the surface is ready for treatment. 

On the other hand, if water beads up or stays on the surface, you don’t need to stain the deck.

Avoid using Thompson’s WaterSeal Waterproofing Stain on painted and recently stained decks. 

Other things to keep in mind while preparing the surface:

  • If you are removing old paint through scraping or sanding, this can expose you to lead. Make sure you’re wearing protective equipment including a NIOSH-approved respirator.
  • Remove all contaminants prior to application; this includes dust, dirt, grease, oil, mildew, and soot. Use a deck cleaner to thoroughly clean surfaces.
  • Peeling, flaking, or loose stains should be removed. Otherwise, this will only give you more peeling and flaking after applying Thompson’s WaterSeal Waterproofing Stain. 


  • 1
    Don’t mix or dilute Thompson’s WaterSeal Waterproofing Stain with other products. Doing so will change the final appearance of the surface.
  • 2
    Shake the can well to ensure color uniformity; shake thoroughly before and occasionally as you apply.
  • 3
    Do a trial on a small patch of wood before you apply on the entire surface.
  • 4Use a brush, roller, exterior paint pad, or compression driven sprayer for efficient application. If you accidentally applied too much, wipe it down to remove excess sealer.
  • 5
    Avoid lap marks and ensure color uniformity by keeping the leading edge wet. It also helps to work either side to side, or from top to bottom. Break down large work areas by using windows or doors as natural breaks.
  • 6
    Just one coat of Thompson’s WaterSeal Waterproofing Stain is enough. If you’d like to enhance the color, you can apply a second coat. Give the first coat two hours to dry completely, then a second coat can be applied after 4 hours.

There you have it! In most cases, Thompson’s WaterSeal Waterproofing Stain will be dry to the touch within 2 hours. However, it may vary depending on the humidity and temperature. 

What Others Are Saying

We wanted to see what homeowners had to say about this waterproof sealer. With all its great benefits, most similar products in the market are just too good to be true. We were glad to discover that Thompson’s WaterSeal Waterproofing Stain is the real deal.

Homeowners have said that using this sealer makes their deck look brand new. When applied to decks that have gone through serious wear and tear, one coat of Thompson’s WaterSeal Waterproofing Stain worked wonders in leaving a beautiful finish. It does an excellent job at resisting water. In short, this product does everything it’s supposed to and so much more, but several customers have pointed out how this sealer leaves a breathtaking look.

However, one customer noticed lots of sediment in the can after applying. He suspects that it could have been a result of not shaking the can well enough, so be sure not to take this step for granted. 

Otherwise, all other reviews of Thompson’s WaterSeal Waterproofing Stain sing praises for this product and the results it gives.

Buying Advice

With a few clicks of your mouse, you can have the Thompson’s WaterSeal Waterproofing Stain shipped directly to your doorstep without any fuss. That’s what’s so great about online shopping! Websites such as Amazon offer this product as well as the tools you’ll need for application, and you don’t even have to leave home.

Final Verdict

Whether you’re working with old or new wood, Thompson’s WaterSeal Waterproofing Stain is an essential tool for any homeowner. It makes aged wood look new again while providing your new wood with superior defense against water, ultraviolet rays, and mildew. The elements will have nothing on your deck with this stain and waterproof sealer all in one!

Our Rating

About the author

Hey, I'm Dale Keese.. thanks for reading.. hopefully this article can save you some time and trouble with your sealing job. I'm also in the process of making some video walk-throughs for youtube so check back soon! thanks

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