Nu-Kill II doesn't just make wasps mad, it kills them. It is formulated with both tetramethrin and permethrin for instant kill and it provides residual kill as insects return to the nest. It does not contain any CFC's and it has a very high dielectric strength. It instantly and effectively kills wasps, hornets, and yellow jackets. It is also excellent against crawling insects such as ants, clover mites, crickets, earwigs, millipedes, and sowbugs (pillbugs), cockroaches (including Asian cockroaches), crickets, centipedes, silverfish, ants, lone star ticks, dog ticks, crickets, fleas, earwigs and more.