Deck Sealing

Serving the Greater Saint Louis Area

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Wooden deck with railing beside a house, patio table, umbrella, and trees beyond.
Deck Sealing

Keep Your Deck Clean

Expert Deck Sealing

After the deck cleaning is done, our customers in the St. Louis area often want our power washing experts to help them with deck sealing. If you're interested in protecting your deck, we can offer you a free quote for both the cleaning and sealing. By waterproofing the horizontal surface every few years, the deck sealing will protect and preserve the wood.


Depending on how many trees overhang your deck, the location of your property, where you live, what type of exposure is involved, and a number of other things, it's possible you won't need another application for several years while your next door neighbor would need it more often.


We only apply high-quality waterproofing sealers that are made to last and provide long-term protection. However, even the best products need to be reapplied after a certain amount of time.


Every project is different in the St. Louis area, so be sure to contact our professionals at Under Pressure to get the best advice with a free consultation and deck sealing estimate.

  • Free Estimates and Consultations
  • High-Quality Deck Sealing Products
  • Experienced and Licensed Professionals
  • Competitive Pricing for Deck Cleaning and Sealing

Benefits of Sealing

By sealcoating and waterproofing your wooden deck, you'll be protecting it from moisture, winter weather, and UV ray damage.


Moisture, of course, is the number one enemy of any horizontal surface around your property. Even if your deck was made completely of pressure treated lumber or an exotic hardwood lumber, it's still going to absorb water.


Then, when the St. Louis weather turns cold and winter ice and snow arrive, the water pools underneath and the wet wood is exposed to even more damaging elements.

Weather-related damage is greatly minimized once the surface is waterproofed, which is important during our St. Louis winters. Plus, the wood will be protected from the normal drying and color-fading that's caused by the sun's UV rays.


With our professional deck sealing service in St. Louis, you can expect high-quality results that offer you the following benefits.

  • Repels water to protect the wood from water ponding and moisture
  • Helps to prevent algae growth, mildew, and mold
  • Helps to protect against liquid spills and stains
  • Protects the color of the wood stain on your deck
  • Helps to preserve the life of your deck
  • Improves the traction of the deck to prevent slip and falls
  • Helps to prevent surface rotting and wood drying
  • Protects the wood deck from insect infestations
  • Sealing and waterproofing offers you a good-looking structure that's maintained and read to enjoy all year.

Latest Exterior Cleaning Tips From Our Pressure Washing Experts

Worker power-washing windows on a modern building facade

5 Fall Season Commercial Pressure Washing Services Every Business Needs

By Under Pressure • April 28, 2026
When it comes to getting your Manchester business as attractive as possible for the upcoming holiday season, there's nothing better than hiring a professional for commercial pressure washing. Fall can be short-lived, so preparing now is going to be important this year. Every local business owner knows how competitive the holiday season is, and those in Manchester, Missouri know fall is the season to take care of their property maintenance before the first snowfall. By now, many will have already scheduled the pressure washing. Have you? If not, it's time to get it done. Not only will a clean exterior prepare your property for winter, focusing on these 5 key commercial pressure washing services can make a world of difference in how attractive your business is during the coming holiday season.
Wooden deck attached to a red brick house with sliding glass doors and horizontal privacy slats

Tips On Deck Sealing For St. Louis Homeowners

By Under Pressure • April 28, 2026
As the weather changes from season to season and from day to day in St. Louis, a wooden deck can quickly develop warping, splitting, and rotting problems. To help prevent these issues, professionals like ours in St. Louis, at  Under Pressure  offer deck sealing services to seal and waterproof decks for protection. A beautiful wooden deck will need some maintenance from time to time: Two of the most important ways to maintain and preserve it are cleaning and deck sealing. Cleaning off the deck removes debris and grime that causes wood rotting, and it should always be done before staining or sealing. The final step of deck sealing protects the wood from moisture and sunlight exposure. Since the protective seal coatings will eventually wear out, you'll need to know how to take care of your deck to make it last for as long as possible.
Worker in yellow boots and gloves standing in a wet rooftop garden, tending gravel and plants.

Benefits Choosing Power Washing Contractor

By Under Pressure • April 28, 2026
Cleaning the siding and other exterior areas of your house and property can take an entire weekend to accomplish. Rather than using up all your free time on the weekends, you could benefit from choosing a power washing contractor, like ours in St. Louis, to do the work for you instead. A reliable power washing contractor who is skilled and trained to leave you with great results can get the job done pretty quickly. Whether you just want them to handle the house washing or cleaning everything including the driveway, roof, deck, and other areas, you could be enjoying the benefits of hiring a professional.

Contact Us for More Information

If you are looking for a professional pressure washer for your St. Louis home or business, then call us today at (314) 200-5932 or request your free estimate using our online form.