"Clean" way to preserve wood?

Anyone familiar with this product? They claim one application is all you need for permanent protection AND works underground as well--love to know if anyone has used it and how it seemed to work. Thinking of using it on posts for tiny house, post and beam, infilled w/ straw bales.

Eco Wood Treatment (made in Canada)
http://www.ecowoodtreatment.com
ecowoodtreatment@yahoo.com
Eco Wood Treatment
The following organizations have used our wood treatment formula:
• Nova Scotia Natural Resources for picnic tables
• City of Calgary for treating sound barrier fencing
• British Columbia Ministry of Transportation for highway and
• municipal sign usage
• Parks Canada in several national parks
• Commercial and residential builders in Canada and the U.S.

This from emails with company: Works for underground though not as long as the nasties-stops prevents white rot fungi
Bottom of post should soak a few days in a double strength

Available at Home Depot--pwdr that mix w/ water
$79 enough for 5 gallons

No experience with the product but this sort of babble on their website is enough to keep me well away: "Chemical free: Eco Wood Treatment is a powder composed of natural substances from minerals."

Either they don't know what a chemical is or they don't know what a mineral is or they are fibbing. Most importantly, they refuse to say what is in their product. Which means it's probably something people wouldn't think was very "eco". "Clean" means something different to each of us, but without honest disclosure of ingredients or even the least hint of the mechanism of preservation this product uses, I would keep it well away from my food, animal, and living systems.

Thanks Dan, excellent points.

Since posting I found a wikipedia article that claims borate works pretty well and even though can wash off some still maintains function. So maybe soaking in concentrated borate solution for couple days, then let dry might to the trick?

Over at a Beekeeping forum they were guessing this product is made from ferrous sulfate and/or boric acid. As with Dan, I'm staying away from this product.

If they are being so cagey about ingredients, likely if not actually toxic, than something very low cost and easy to put together at home i.e. D.I.Y.

Check out this post Natural wood preservation

It's the "too good to be true..." part. I am thinking a borate soak will do the trick well enough unless I hear some convincing experiential tales here about some better prep for underground preservation

Hi folks...I posted something at Wood Preservatives that may be useful...

Regards,

j

Jay, thank you, very informative post! Useful stuff for sure