Which mix formula did you use?Good information. I used to mix my own to treat logs and lumber, but have since just been using timbor. Works just fine. Like you say the key is keeping it dry after application. Other wise it's just a waste
It's good to have in case bugs get into any of the outbuilding structures. PPBs, roaches, carpenter ants, termites. Can spray down the insides and the foundations/sills.
You can mix the solution with brown sugar/honey/syurp and put it out bait stations in tuna cans. Works great on ants. They bring it home and it kills the nest.
I just had a thought? The powder poured down the entrance of a ground bee/hornets nest might work too.