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I just finished installing a 6' Shadowbox fence in my back yard, and have a question about waterproofing or sealing to protect color and protecting the wood.

I used pressure treated lumber, 4x4 post, 2x4 stringers and 5/8x6x6 slats. I've heard that you need to let it cure or dry before you put anything on it!!!!! Will something like Thompson's Water Sealer work, or will I need some other product. I would like for it to maintain the light color if possible. I have spent to much time and money on this project to have it damaged by weather.

Any suggestions would be great.

Thanks
 

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Mold!! Let's kill it!
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In my opinion, the only thing Thompson's water seal has going for it is a smooth marketing campaign. I use CWF made by Flood. The big box stores carry it. It will last longer, but you'll still need to apply it every few years.
 

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I have some PT 4X4's that originally formed a crib around the base of a tree. They were there for about 10 years.
The tree died, and the cribbing was recovered.
I made garden edging from them and they were in place, semi buried in the ground for another 10 years.
Then I removed them and left them laying out back for another 5 years.
This year I used them as a foundation for a garden shed. Just as sound as the day they were made.
PT lumber has a long guarantee period, and if its left alone, it will last for ages!
 
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