The thing about toxins in treated lumber, it isn't a bug in the product. It is actually the feature. Treated lumber is just as porous and traps water like any o

The thing about toxins in treated lumber, it isn't a bug in the product. It is actually the feature. Treated lumber is just as porous and traps water like any other lumber. It has so much copper compounds trapped in it that almost nothing can ever break it down. If you bury treated lumber in the ground you will find it sterilizes a small layer of soil around it. This is why it is so effective. Anything trying to reduce the toxicity of treated lumber by swapping on a coating runs into the same problem as traditional methods like painting the lumber: a single tiny hole in the coating allows the entire piece of lumber to be compromised.