waterproof pressure treated wood

3 Waterproofing Solutions for Pressure Treated Wood

Pressure treated wood is a versatile type of wood that has been treated with chemical preservatives so as to protect it against decay as well as insects.

The whole process involves putting the wood in a depressurized tank thus removing the air. Once the air has been removed, it is replaced with a special preservative.

Keep in mind that the pressure treating process does not prevent weathering. This means that pressure treated wood is not waterproof. If you want to learn how to waterproof pressure treated wood, keep on reading this guide.

⇒ Note: There are particular types of treated lumber that has water repellents applied during the pressure treating process. Don’t forget to read the end tag to see whether a water repellent substance has already been used. If this is not the case, you need to apply apply a wood sealing product.

Use an outdoor wood sealer for pressure treated wood

A high quality wood sealer doesn’t form a thick coating on the surface of the wood. At the same time, the product also allows the remaining moisture to evaporate even after the coating has been applied.

There are three types of wood sealers that you can use depending on whether you want to keep the color of your pressure treated wood or not:

  • Solid stains: These wood sealers have more pigment and may alter the initial color of the wood.
  • Semi-transparent: This type of wood sealing products have very little pigment and are suitable for deck boards and other foot traffic intense areas.
  • Clear: These products don’t have any pigment. While they do offer weathering protection, they don’t prevent the wood color from fading.

Keeping these details in mind, here are the best waterproofing solutions to use on pressure treated wood to keep your fences, decks and porches dry when it’s raining cats and dogs.

Best water sealers for pressure treated wood

#1 Deck Premium Semi-Transparent Wood Stain

Deck Premium pressure wood sealer

You can use this product on all types of pressure treated wood, including softwood such as pine, cedar, fir or redwood. It’s perfect for decks, fences, wood sidings, patio furniture and play sets.

This is a water based  solution. This means that if you have any previous oil based finish applied on the wood, you need to first sand it off before applying the product. If you need to apply two coats of sealer, you need to first wait 30 – 45 minutes for the wood to soak in the first coating.


Thompsons WaterSeal Wood Protector

Thompsons WaterSeal pressure treated wood

If you’re looking for a product to apply on new pressure-treated wood, the Thompsons WaterSeal Wood Protector is the right choice for you.

Keep in mind that the product adds a yellow tint to your wood. This feature comes in handy because it shows where you already applied the coating. It does make the wood look a shade darker, and some may not like this fact.


SEAL-ONCE Marine Premium Wood Sealer

SEAL-ONCE waterproof pressure treated wood

If you’re living in a high-moisture area, the SEAL-ONCE Marine Premium Wood Sealer is the best product to protect your outdoor wood structures. As a matter of fact, this solution is perfect for any wood structure near water, including boat decks, back decks, pontoons and so on.

There you have three excellent products for waterproofing pressure treated wood. To sum it all up, here’s what product to get depending on your needs:

  • #1 Deck Premium Semi-Transparent Sealer: Get this product to waterproof wood structures around the house.
  • Thompsons WaterSeal Wood Protector: Get this product is you want a two year protection guarantee.
  • SEAL-ONCE Marine Premium Wood Sealer: Get this solution to protect wood structure that are daily exposed to water.
Scroll to top