You can waterboard them with it. If you want to effectively kill them, I'd recommend using the tried and true neurotoxin option sold at your local grocery store. You can be your own Saddam Hussein without having to hide in the most random places after committing your war crimes.

Wasps, definitely, and it does basically suffocate them. We use a water, dish soap, and peppermint mix on paper wasp nests that form in our eaves.