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How To Apply Wood Sealer On Deck

How to apply wood sealer on deck?

The deck is a part of the home where most memories gather. It’s where you spend time with your family and friends or enjoy your alone time with coffee in the morning. But we must apply wood deck sealer to keep it beautiful and intact for years. Applying a wood sealer on your deck is easy, but do you know how? This blog will tell you how to use a deck sealer with simple steps.

Why Sealing Your Deck is Important?Applying Deck Sealing

Your deck is exposed to various elements throughout the year, including sun, rain, snow, and dirt. These elements cause your deck to fade, warp, and become vulnerable to rot. The deck sealer acts as a protective barrier, preventing moisture from seeping into the wood. You can always think of deck sealer as a sunscreen for your deck — without it, your deck will age prematurely.

Choosing the Right Wood Deck Sealer

Hempshield Wood Finish and Deck Sealer

The options while selecting a deck stain and sealer are overwhelming. There are several types of deck sealers available.

  • Clean Sealer – These deck sealers maintain the natural look of the wood
  • Semi-Transparent Stains – It offer a bit of color while still showing the wood grain.
  • Solid Stains- They provide the most color to your deck, but it also has the disadvantage of hiding the wood grain.

The best deck stain depends on your preference and the level of protection you need. While selecting the deck stain and sealer, always read reviews and consider the climate you live in.

Preparing Your Deck for Sealing

Preparation is a critical step to a successful sealing job. Remove all the furniture, plants, and other items from the deck. Cover your plants or landscape around the deck to protect them from chemicals.

Cleaning the Deck

Before applying a deck sealer, ensure your deck is clean. Use a deck cleaner or a mixture of water and mild detergent. Scrub your deck surface with a stiff brush to remove dirt, mildew, and old stains. Rinse thoroughly and let it dry completely.

Deck Cleaning

Repairing Any Damage

Inspect your deck for any signs of damage, such as loose boards, nails, or screws sticking out. Replace damaged wood and secure any loose boards. This step is crucial because sealing a damaged deck will only mask the problems temporarily.

Deck repairing

Sanding the Deck

Sanding smooths out your deck surface. This process opens up the wood pores, allowing the sealer to penetrate better. Use medium-grit sandpaper for this task. While sanding, always sand in the direction of the wood grain to avoid scratches. Sweep or vacuum the deck to remove all dust and debris.

Applying the Deck Sealer

Once your deck is prepped, apply the wood deck sealer. Choose a dry day and use a brush, roller, or sprayer to apply the sealer. Brushes are best for getting into crevices, while rollers and sprayers cover larger areas quickly.

Applying deck Sealer

To ensure an even application, follow these advices

  1. Work in small sections to prevent the sealer from drying before evenly spreading it.
  2. Use long, smooth strokes to help avoid lap marks.
  3. Don’t use excessive sealer, leading to sticky spots and uneven drying.

Drying and Curing Times

After applying the sealer, allow your deck to dry thoroughly. Depending on the product and weather conditions, this can take 24 to 48 hours. Avoid using the deck during this time to ensure the sealer cures properly.

Maintaining Your Sealed Deck

After sealing your deck with wood deck sealer, you must also maintain it. Maintaining your sealed deck involves regular cleaning and inspection. Sweep off debris regularly and clean up spills promptly to prevent stains. Depending on the weather and wear & tear, you should apply a maintenance coat of sealer every two years.

Common Mistakes to Avoid

Before applying the wood deck sealer, avoid some of the most common mistakes.

  • They need to clean the deck properly. Dirt and mildew prevent the sealer from adhering correctly.
  • Never apply the deck stain and sealer on a wet deck.
  • Don’t skip the sanding step, resulting in a rough finish and poor sealer absorption.
  • Don’t apply too much sealer, as it causes the surface to become sticky and uneven.

Eco-Friendly Sealing Options

If you’re environmentally conscious, look for eco-friendly deck sealers that are low in VOCs (volatile organic compounds) and are made from natural ingredients. These products are safer for you, your family, and the environment.


Sealing your deck is an essential part of deck maintenance that enhances its appearance and extends its life. By following these steps and choosing the suitable wood deck sealer, you can ensure your deck remains a beautiful and functional part of your outdoor space for years.


  1. Can I seal my deck or hire a professional?

You can seal your deck yourself if you’re comfortable with DIY projects. However, hiring a professional might be worthwhile if you have a large deck or need more time and tools.

  1. How long should I wait before sealing a new deck?

For a new deck, it is recommended that you wait at least 30 days before applying a sealer. This allows the wood to dry out completely.

  1. What is the best weather for applying deck sealer?

The ideal weather is dry, with temperatures between 50-90°F. If rain is forecasted within 24-48 hours, avoid sealing your deck.

  1. Can I apply a new sealer over an old one?

It’s best to remove the old sealer first to ensure proper adhesion of the new sealer. Prepare the surface with a deck cleaner and sander.

  1. How can I tell if my deck needs resealing?

A simple water test can help. Sprinkle water on the deck – the sealer is still effective if it beads up. If the water soaks into the wood, it’s time to reseal.


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