Black Flag is a brand of
insecticide made by the
Clorox[?] company. Its active ingredients are sumithrin and tetramethrin (Black Flag Flying Insect Killer); propoxur (Black Flag Wasp, Bee & Hornet Killer); ETOC and esfenvalerate (Black Flag Ant & Roach Killer); and permethrin (Black Flag Ant & Roach Killer).