Finishing #1: Sealing Pressure-treated wood

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Blog entry by Hawgnutz posted 07-23-2007 06:19 AM 6364 reads 0 times favorited 4 comments Add to Favorites Watch
no previous part Part 1 of Finishing series Part 2: -- Accenting grain on Black Ash »

I am replacing the boards on my outside workbench. I have some pressure-treated wood, but want to seal it so that the green goo will not seep onto any of my wood projects. What is eth best way to seal the pressure-treated wood?

-- Saving barnwood from the scrapyards

4 comments so far

View Douglas Bordner's profile

Douglas Bordner

4024 posts in 4090 days

#1 posted 07-23-2007 10:15 AM

I don’t know how the Chromated Copper Arsenate affects topcoats. I imagine house paint would be the way to go.
After that spar vanish would seem like a likely choice.

-- "Bordnerizing" perfectly good lumber for over a decade.

View TomFran's profile


2957 posts in 4020 days

#2 posted 07-23-2007 03:14 PM

I have been informed by a painting professional that you must wait until the wood has dried sufficiently before applying anything to it. Living in Arizona as you do, it may not take very long. In order to paint it and have it stay stick, you will have to first apply a paint primer and then a good exterior paint.

-- Tom, Surfside Beach, SC - Romans 8:28

View Hawgnutz's profile


526 posts in 4102 days

#3 posted 07-23-2007 05:28 PM

Thanks, Doug and Tom. What I had planned to do was wait until it has dried suficiently and eventually coat it with spar varnish. we have monsoon season right now, so I need to store it inside to dry…LOL (It is a DRY heat—except for July and August.)

I guess, I will let it dry for a week or two, then seal it with Zinser top coat. Is that a good enough sealer, Tom? Am I figuring correctly?
God Bless,

-- Saving barnwood from the scrapyards

View Ethan Sincox's profile

Ethan Sincox

767 posts in 4200 days

#4 posted 07-23-2007 06:02 PM

The sealer might be good enough, Hawg, but your drying time might not. I’d suggest using a moisture meter to make sure it gets down to the 8% or so you should be looking for before you seal it.

The pressure treated lumber I’ve always worked with has almost always had water literally dripping out of it when I picked it up. Not sure if two weeks would be enough to get the necessary moisture out of it. And I’m not sure how the Zinser will work if the wood is still too wet.

-- Ethan,

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