Sealing Your Deck

Sealing your deck with Thompson’s WaterSeal is a vital step in protecting it from the elements and preserving its beauty and longevity. Thompson’s WaterSeal is a popular choice for sealing decks due to its effectiveness in repelling water, preventing UV damage, and resisting mildew growth. In this comprehensive guide, we’ll walk you through the steps and process of sealing your deck with Thompson’s WaterSeal, covering everything from preparation and application to maintenance and cleanup.

Step 1: Evaluate Your Deck

Before beginning the sealing process, take some time to evaluate the condition of your deck. Inspect for any signs of damage, such as cracks, splinters, or loose boards, and address these issues before sealing. Check for mildew or mold growth and clean the deck thoroughly if necessary. Additionally, consider the age and type of wood your deck is made from, as this can impact the sealing process and product selection.

Step 2: Choose the Right Thompson’s WaterSeal Product

Thompson’s WaterSeal offers a variety of products designed for different types of wood and levels of protection. Choose the product that best suits your deck’s needs, whether you’re looking for a clear sealer to preserve the natural beauty of the wood or a tinted sealer to enhance its appearance. Consider factors such as UV resistance, water repellency, and ease of application when selecting the right product for your deck.

Step 3: Gather Your Materials and Tools

Before you begin sealing your deck, gather all the materials and tools you’ll need for the job. This may include:

  • Thompson’s WaterSeal product of your choice
  • Paintbrush or roller
  • Paint tray
  • Drop cloths or plastic sheeting
  • Deck cleaner and scrub brush (if cleaning is needed)
  • Garden hose or pressure washer (if cleaning is needed)
  • Sandpaper or sanding block (if sanding is needed)
  • Painter’s tape (if protecting surrounding areas)
  • Safety gear, such as gloves, safety glasses, and a respirator mask

Having everything you need on hand will help streamline the sealing process and ensure a smooth and efficient application.

Step 4: Prepare the Deck

Proper preparation is key to a successful deck sealing project. Start by cleaning the deck thoroughly to remove dirt, debris, mold, mildew, and any existing sealant or finish. Use a deck cleaner and scrub brush or a pressure washer to tackle stubborn stains and buildup. Allow the deck to dry completely before proceeding to the next step.

If your deck has rough or splintered areas, consider sanding them smooth to create a more uniform surface for sealing. Use a coarse-grit sandpaper or sanding block to sand the wood in the direction of the grain, being careful not to over-sand or damage the surface.

Step 5: Protect Surrounding Areas

Before applying Thompson’s WaterSeal, take precautions to protect surrounding areas from overspray or drips. Lay down drop cloths or plastic sheeting to cover nearby plants, landscaping, furniture, and other surfaces. Use painter’s tape to mask off any areas you want to avoid getting sealer on, such as siding, railings, or trim.

Step 6: Apply Thompson’s WaterSeal

Once the deck is clean, dry, and properly protected, it’s time to apply the Thompson’s WaterSeal. Stir the product thoroughly before use to ensure proper consistency and even distribution of pigments and additives. Pour the sealer into a paint tray and dip the paintbrush or roller into the product, removing any excess.

Start by applying the sealer to the deck boards, working in small sections at a time. Use smooth, overlapping strokes to ensure even coverage and avoid puddling or drips. Pay particular attention to areas that are exposed to the elements, such as horizontal surfaces and high-traffic areas.

If you’re using a roller, use a long-handled roller to cover larger areas quickly and efficiently. Work in the direction of the wood grain, rolling back and forth to ensure thorough penetration of the sealer into the wood fibers.

Step 7: Allow the Sealer to Dry

After applying Thompson’s WaterSeal to the entire deck, allow it to dry completely before walking on or using the deck. The drying time will vary depending on factors such as temperature, humidity, and the porosity of the wood. In general, you can expect the sealer to dry to the touch within a few hours, but it may take up to 24-48 hours for it to cure fully.

During the drying process, avoid exposing the deck to moisture or foot traffic, as this can affect the performance and durability of the sealer. Keep pets, children, and other household members off the deck until the sealer has dried completely.

Step 8: Apply Additional Coats (if Necessary)

Depending on the condition of your deck and the level of protection desired, you may need to apply multiple coats of Thompson’s WaterSeal. Allow each coat to dry completely before applying the next one, following the same process outlined above. Additional coats can enhance the durability and longevity of the sealer, ensuring your deck stays protected for years to come.

Step 9: Clean Up

Once the sealer has dried, clean up any spills, drips, or splatters with soap and water or a mild household cleaner. Dispose of any used materials, such as paint trays, brushes, or rollers,


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