Pressure treated wood sealer for cut ends

25.03.2020
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Can You Paint Pressure Treated Wood - WoodImprove

painted wood

painted woodIf you have a deck, stairs, or other structure made with pressure treated lumber, you may not like the look of the brown or green wood surface created by pressure treatment. You may be asking, can you paint pressure treated wood?

The short answer is, yes, but it’s a little more complicated than painting wood that isn’t pressure treated. There are a couple of things you need to know about how to prepare the wood before you get out the paint and paint brush. You also need to use the right kind of paint to make this project successful.

Once you have this knowledge and a few simple tools, your pressure treated painting job will come out looking great and lasting as long as possible. Table of Contents show

What Exactly is Pressure Treated Wood?

Pressure treating wood is a process done at the lumber mill to make the wood more resistant to rot and fungus attack. When lumber is processed, it is submerged in a vat of chemicals and put under high pressure to get the chemicals to penetrate deeply into the wood grain. After that, the wood is set on racks until it is dry to the touch and ready for sale.

Pressure Treating

There are several different chemicals used for treating lumber. The most common are chromated copper arsenate, or CCA and alkaline copper quaternary, or ACQ. However, building departments are phasing out CCA wood for residential use, so you are more likely to find it on existing structures.

pressure-treated-lumber

pressure-treated-lumber

The copper is what often gives pressure treated wood a slightly green tint, although the ACQ treatment makes the final product come out a brown color.

If you look closely at the surface of pressure treated lumber, you will notice small indentations spaced over the board. These help the chemicals penetrate better into the surface of the wood, and their presence is a sure way of determining a piece of wood has been pressure treated, no matter what the color is.

Chemicals

The chemicals used for pressure treating lumber are toxic if you ingest or inhale them. Always use gloves when handling this type of wood, wash your hands after handling it, even when you use gloves, and use a dust mask when you saw or drill holes in pressure treated lumber.

Here are the steps to paint your lumber

1. Dry the Lumber

Unless you use kiln-dried pressure treated wood, one problem with putting a coat of paint on this type of wood is that pressure treated lumber is not thoroughly dry for quite a long time after the chemical pressure treatment. Expect to wait three to four months for new pressure treated wood to completely cure before painting it.

While you can handle new pressure treated boards without noticing the chemicals on your gloves, there is still moisture, pitch, and resin inside the wood which needs time to dry out before you paint it.

Allowing the wood to completely dry before painting is one secret to a good paint job on this type of lumber.

Because it is not thoroughly dry, new pressure treated lumber can quickly warp and bend if you don’t handle it correctly. After you buy new pressure treated lumber, build with it right away, or keep it stacked flat in a dry place and wait at least 60 days to four months before painting it. Patience is a crucial ingredient in this project.

Use stickers

If you’re not building right away, prevent the boards from warping by stacking them using stickers – thin pieces of wood slightly wider than the wood you are stacking.

Paint stirring sticks work just fine for this, but you can use any type of stick as long as they are all the same thickness.

Place the stickers under the bottom piece of wood on the ground at each end of the board and spaced about every four feet under the length of the plank. Then set down your first piece of wood on the bottom stickers.

Then put stickers on top of the bottom board, using similar spacing as before, and stack the next piece of lumber on top. The stickers provide air space between the planks and help with drying and keeping the wood flat and straight until you’re ready to use it.

Weather Conditions

Besides making sure your pressure treated lumber is dried out from the treatment process, it’s also essential not to paint any wood if it’s wet from rain or snow.

Do your painting during warm, dry weather and low humidity conditions. If your lumber is outside, wait at least a month after the last rain before painting.

How can you tell if the chemicals are fully dried out before painting pressure treated wood? There’s a simple test you can use.

Just pour a small amount of water onto the wood and watch what happens. If the water beads up on the surface, the wood is not dried out enough. If the water sinks into the wood grain, it’s dry enough to get out your paint brushes.

Kiln Driyng

Kiln-drying involves stacking lumber in a container and applying heat to help it dry faster. Kiln-dried lumber does not warp as easily as wet lumber because all of the moisture evaporates during the drying process.

You can buy kiln-dried pressure treated lumber, also called Kiln-Dried After Treatment, or KDAT, if you don’t want to wait as long for the wood to dry before you paint it.

2. Clean the Wood

If you are painting a pressure treated structure outdoors, the wood may have dirt and grime on it which you need to remove before painting. Also, you need to wash off the chemicals on the surface of the wood before you paint.

It’s simple to do. You will need a hose with a jet nozzle, a stiff brush, and a bucket of water with a mild detergent. Wet the area, scrub with the brush and soapy water, and use the spray of water to clean it off. Don’t use a pressure washer because this can gouge the wood, reducing the effectiveness of the pressure treatment for preventing rot and insect damage.

After cleaning, you’ll need to wait for the wood to dry completely before moving on to the next step.

3. Prime It Thoroughly

priming pressure treated wood

priming pressure treated woodFor your final paint job to completely cover the color of the pressure treatment, it is essential to use a high-quality primer before you paint on the finish coats. Be sure the label on the primer says you can use it outside. Using a primer will also ensure the finish coats of paint adhere to the wood surface without peeling.

Apply a coat of primer to all surfaces of the wood you plan to paint, and let it dry for at least one day before moving on to the next step.

You can use a paint sprayer or a paintbrush to apply both the primer and finish coats, but paint rollers probably won’t get paint into all of the crevices on the surface of most pressure treated wood.

4. Top Paint Coats

painting deck

painting deckThe best paint to use for pressure treated wood is a high-quality, exterior latex paint. If you are installing lumbers in an indoor location, you can use interior paint.

You can choose any color you like, but lighter colors may take more coats to hide the green or brown color underneath completely unless you use a primer. Whatever color you use, plan on doing at least two finish coats over the primer, and wait a day between coats so the paint can dry thoroughly.

It does take a bit more work and patience to paint pressure treated wood than painting untreated lumber. However, if you follow these steps carefully, your finished job will likely come out looking good and lasting a long time.


pressure treated wood sealer for cut ends
Cut-N-Seal Treated Wood Sealer

Cut-N-Seal is a water-based brush-on sealer and moisture repellent for cuts and holes in pressure treated wood that expose untreated wood above ground where appearance counts, on deck boards, railing, post tops, and fence boards. Provides the required treated wood cut sealer as required by 2012 IRC 317.1.1 and 318.1.2 AWPA M4

One quart of end sealer covers approx 500 square feet of decking. It is highly recommended that end grain cuts are protected in order to prevent checks and splits.

Product Applications:

  • Pressure treated wood should be dry and clean.
  • Cut-N-Seal is ready to use – do not dilute.
  • Shake or stir contents before and periodically during use.
  • Apply a first coat by brush, allow to absorb, and apply a second coat.
  • Clean equipment (brushes, etc.) with soap and water.
  • Store in tightly closed container. Do not freeze. Keep above 40°F (4°C).
  • Dispose of empty container in household trash.
Coverage: For use on Above Ground treated wood products. Use Cut-N-Seal® on areas that have been drilled or saw cut in treated wood deck boards, railing, post tops, fence boards, etc. where appearance counts. A 1 quart can will seal approx. 330 5/4?6 deck board ends or approx. 220 2?6 deck board ends, coated twice. The water-based formulation is low odor. It is ready to use, directly from the can, and it cleans up with soap and water. Cut-N-Seal is not recommended to replace pressure treatment. Do not use to re-coat pressure treated wood surfaces. Do not use for pressure treated wood in ground contact applications or in preserved wood foundations. Package Quantity Single Quart Container of Brown Treated Cut Sealer Color Brown Manufacturer Koppers Manufacturer Link http://cut-n-seal.com/ Installation Help http://cut-n-seal.com/application/ Dimensions Quart Container

pressure treated wood sealer for cut ends


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