Occasionally, questions about how to control rot come up on WoodNet. The commercial products I see mentioned are really costly. One source for home-brewed treatment keeps falling off my radar, especially when I need it. When I stumble onto the article, I keep saving a copy to a Word file and am now at copy 3 in an obscure directory. The instructions in the following link include antifreeze and borax, separate solutions. I have used borax but not ethylene glycol (antifreeze). I don't even know if EG is available anymore. Here is the link:
http://www.angelfire.com/nc3/davecarnell/rot.html
http://www.angelfire.com/nc3/davecarnell/rot.html