Does this product work for wasps too?

Yes it does the yellow and the red ones. Have killed both kinds

Wasps yellow jackets and hornets are all hornets. This product will work on them all. It is comprised of a neurotoxin that destroyed the insects neurotransmitters between it's ganglia and body. The ganglia of the insect is what it's brain is, though a ganglia is not a brain technically. Once the connection is broken the bug essentially dies of nervous system shut down. It would be the same with a human, however neurotoxin work differently on mammals than they do with insects.