I have always used Jasco Termin-8 for this. As sold, it has twice the concentration of Copper Napthenate as Coppergreen.
Lately I have seen professional applications of some kind of a Boron compound called Tim-Bor. It is dissolved in water and sprayed on.
When I built my own house, with my own two hands, 20 years ago, I sprayed everything, framing, plywood sheathing, roof deck with the Jasco. Two or three coats everywhere but on the roof deck, where I used six coats on each side. Used 60 gallons on an 1800 sq. ft. house. No termites, and no dry rot, ever.
On the new house, my wife insisted on hiring a contractor, and the best I could get done was the Tim-Bor. They only sprayed the roof deck twice, and with less spray than i would have used, but we will see.
In some states you have to have a license to buy Tim-Bor, others anyone can get it.