What is the Best Sealer for Pressure Treated Wood : Ultimate Guide for Long-lasting Protection

Pressure treated wood is a popular choice for outdoor projects such as decks, fences, and pergolas due to its durability and resistance to decay and insects. However, to extend the lifespan of pressure treated wood and keep it looking great, it’s important to apply a high-quality sealer. In this guide, we’ll discuss the best sealer for pressure treated wood, factors to consider when choosing a sealer, and how to apply it effectively.

Factors to Consider When Choosing a Sealer

Before diving into the best sealers for pressure treated wood, it’s essential to understand the key factors to consider when making your selection:

  • Water Resistance: Look for a sealer that provides excellent water resistance to prevent warping, cracking, and rotting of the wood.
  • UV Protection: The best sealers offer UV protection to prevent sun damage and fading of the wood’s natural color.
  • Mold and Mildew Resistance: Choose a sealer that contains mold and mildew inhibitors to prevent unsightly growth on your pressure treated wood.
  • Penetrative vs. Film-Forming: Consider whether you prefer a penetrative sealer that absorbs into the wood or a film-forming sealer that creates a protective layer on the surface.
  • Longevity: Evaluate the expected lifespan of the sealer to determine how frequently reapplication will be necessary.

The Best Sealers for Pressure Treated Wood

Now that we understand the essential factors to look for in a sealer, let’s explore some of the top options available on the market:

Sealer Key Features
Thompson’s WaterSeal Advanced Natural Wood Protector Waterproofing, UV protection, mildew resistance, natural finish
READY SEAL Exterior Wood Stain and Sealer No primer needed, easy application, various color options
DEFY Crystal Clear Composite Deck Waterproofing Sealer Suitable for composite wood, crystal clear finish, water-based formula
Cabot Australian Timber Oil Deep penetration, rich color, mildew and UV protection
Woodrich Brand Timber Oil Deep Penetrating Stain & Sealer Deep penetration, long-lasting, eco-friendly formula

These sealers have been highly rated for their performance in protecting and enhancing the appearance of pressure treated wood. When selecting a sealer, consider factors such as the wood species, desired finish, and environmental conditions in your area to determine the best option for your project.

How to Apply Sealer to Pressure Treated Wood

Once you’ve chosen the best sealer for your pressure treated wood, it’s crucial to follow the correct application process to achieve optimal results:

  1. Preparation: Clean the wood surface thoroughly to remove dirt, mildew, and any previous coatings. Allow the wood to dry completely before applying the sealer.
  2. Applicator Selection: Depending on the sealer type, choose an appropriate applicator such as a brush, roller, or sprayer for an even and consistent application.
  3. Application: Follow the manufacturer’s instructions for the number of coats to apply and the recommended drying times between coats. Ensure even coverage and avoid over-application to prevent drips and puddles.
  4. Maintenance: Regularly inspect the sealed wood for any signs of wear and reapply the sealer as needed to maintain protection.

What is the Best Sealer for Pressure Treated Wood  : Ultimate Guide for Long-lasting Protection

Credit: hempshields.com

Frequently Asked Questions On What Is The Best Sealer For Pressure Treated Wood : Ultimate Guide For Long-lasting Protection

What Is Pressure Treated Wood?

Pressure treated wood is lumber that’s been infused with preservatives to protect it from decay, rot, and insect damage.

Is Sealing Pressure Treated Wood Necessary?

Yes, sealing pressure treated wood helps maintain its appearance, prevents cracking, and prolongs its lifespan.

What Are The Benefits Of Sealing Pressure Treated Wood?

Sealing pressure treated wood enhances its natural beauty, protects it from weathering, and reduces maintenance needs.

How Often Should I Seal Pressure Treated Wood?

It’s recommended to seal pressure treated wood every 1-3 years, depending on exposure to weather and use.


Choosing the best sealer for pressure treated wood is essential for preserving its integrity and enhancing its appearance. By considering factors such as water resistance, UV protection, and application method, you can select a sealer that meets the specific needs of your outdoor project. With proper application and maintenance, a high-quality sealer will help your pressure treated wood look beautiful and last for years to come.

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