Al Smith
Mac Daddy
Really .Evidently you've never heard of copper sulfate then .Another side note: Copper does not hurt trees. How did that myth begin and why is it so widespread?
The only tree I every bolted together was one of my dads favorite apple trees .I used an 18" DA bolt [double arming ] with galvanized washers and nuts .It saved to old tree for a number of years until it met its demise a few years back in an ice storm .
Not a big deal ,lifted the split back in place ,bolted it and smeared about a gallon bucket full of roofing tar over the crack .It worked at least for a while .