Green Products 33004 Copper Brown Wood Preservative for Surface Protection, 1-Quart

The best: As another reviewer has said, the oil based naphthenate is better than the water based. It penetrates deeper into the wood than its water based cousin. Both are superior to Boric Acid solutions, which do not penetrate nearly enough to be effective. Apply late in the after noon when the relative humidity is low to get maximum penetration. And the reviewer stated, oil based copper naphthenate is the best preservative available today.The worst: It has nauseating fumes. You will need to wear a quality respirator, like 3M's, and rubber gloves. You may have to leave your clothes outside after you finished as the fumes will permeate them. If you do not wear a respirator, expect to endure the deleterious effects of VOCs, like blain dabage.

Great stuff. Has a consistency thinner than water, but goes on easy enough with a brush if that's the way you need to do it. It really soaks into the wood, and quite fast. Yes it has a strong smell but i don't find it to be unpleasant. Time will tell on the effectiveness.If you are dip treating your wood, as recommended, buy more than you think you will need. As i said, it soaks in very well.

This is an excellent wood preservative. It goes on easily and is instantly absorbed. You must follow the user guidelines due to its toxicity. Gloves, eye protection and a mask/respirator.

This is not what I expected at all. I have a few projects I wanted this for. I read and researched a while. The reviews seem to be excellent. I coated, twice as directed, the wooden bottoms of two crane statues. The consistency was like water. This did not seal, as I had hoped. More like a stain. Would not recommend as a water proofer

Seems to work as described, time will tell if the wood is prevented from rotting and insect infestation. Wood soaks it up fast, same with a repeat coat a few weeks later so it doesn't seem to get saturated by absorption. Very strong odor for a week or more, needs to be kept outdoors

Stinks horribly for a few days even though it was used outside but seems to work!

I use Copper Green as wood preservative when the greenish tint left behind is not an issue. I use THIS brown toned version to get same preservative effect but where I wish to have a more brown tone.Good product.

Used this on treated 4 x 4 posts on a pier and beam shed foundation. I poured concrete around the posts in 18 in holes. There where complaints it smelled, but I didn't notice a real strong smell. I found mineral spirits and stain smelled much more!