DIYers: How to Waterproof Your Deck Like a Pro


You’ve made the investment in a beautiful deck that compliments your home, but now it’s time to take it a step further by protecting this investment and properly sealing and waterproofing it. One of the most effective ways to achieve this is by using the right deck sealant the first time around. 

Understanding the Importance of Deck Waterproofing

Your deck is exposed to various weather conditions, from the harsh sun’s UV rays to the cold winter chill, and from the heavy summer rains to the dry autumn winds. These weather conditions can gradually degrade the wood, causing it to warp, peel, and rot. That’s why it’s crucial to waterproof your deck. Sealing your deck not only prevents water damage but also extends its lifespan, thereby saving you the cost of frequent repairs or replacement.

How Water Damages Your Deck

Water can wreak havoc on any deck that isn’t properly sealed, leading to a variety of issues that can cost you a small fortune to correct. When water penetrates the wooden surfaces, it can lead to several issues:

Softening of Wood

Water can seep into the wood grains, causing them to expand and contract. As time passes, the wood can actually start to soften. This can lead to structural instability, potentially turning your deck into a hazard.

Dry Rot

Dry rot is another common issue that results from unsealed decks. Specific fungi species can infest the wood, feeding off its components, and causing it to deteriorate. This can weaken your entire deck structure and, if not addressed promptly, can lead to its collapse.

Water Stains

Water stains can be a visual nuisance, making your deck appear older and unkempt. By waterproofing your deck, you can prevent water stains from forming, maintaining the pristine look of your deck.

The Power of Liquid Rubber

Liquid rubber is one of the more popular solutions you can consider for deck waterproofing. It’s a cost-effective and environmentally safe solution that any DIYer can apply to their deck in an afternoon with just a few coats to add lasting protection against water, weather and the elements, preserving their decking for years to come. 

Easy Application

One of the main advantages of liquid rubber is its ease of application. This sealant can be easily applied using a roller, broom or even simple paint brush. A two person crew can easily finish an entire deck in just a few hours. 


In comparison to other waterproofing solutions, liquid rubber offers a highly effective yet affordable solution. It offers five to ten years of protection, giving you peace of mind for a long time to come at a reasonable cost. 


Liquid rubber forms a robust, waterproof barrier that stands up to harsh weather conditions. Its durability ensures that your deck stays protected year-round, providing you with peace of mind.

VOC-Free and Non-Toxic

Liquid rubber is a VOC-free (Volatile Organic Compounds) and non-toxic solution, making it a safe choice for you, your family, and the environment.

How to Waterproof Your Deck with Liquid Rubber

Before getting started with the waterproofing process, it’s crucial to prepare your deck.

Preparing Your Deck

  • Cleaning: Start by cleaning your deck thoroughly using a gentle power washer setting. Then allow your decking to dry before you seal it. 
  • Applying a Primer: Applying a primer creates a moisture vapor barrier that provides extra adhesion, improving product performance and longevity.

Once your deck is prepared, you can proceed with the waterproofing process.

Waterproofing Your Deck

Here are the steps to apply your Liquid Rubber Polyurethane Deck Coating:

  • First Coat: Apply your first coat of rubber polyurethane deck coating generously but evenly. Ensure that the product is also applied in between deck boards.
  • Additional Coats: Allow at least 8 hours of drying and curing time in between each coat, and make sure you apply thick and generous coats of optimal protection. 
  • Final Touches: After applying all the coats, wait for three days before allowing light foot traffic on the deck or to replace any furniture.

Waterproofing Your Deck: A Worthwhile Investment

Waterproofing your deck surfaces is more than just a home improvement project. It’s an investment that protects your deck from the elements, extends its lifespan, and enhances its aesthetic appeal. Consequently, it also increases your property’s value, making it a worthwhile investment.

In conclusion, understanding how to waterproof deck surfaces is vital for any homeowner. By following this guide, you can ensure that your deck is well-protected, allowing you to enjoy your outdoor space without worrying about water damage or costly repairs. 


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