Black Flag Foaming Wasp & Hornet Killer Aerosol Spray, 14-Ounce BLANKETING FOAM: Foaming aerosol kills listed insects by contact. UP TO 20 FOOT JET SPRAY: Treat the nest from a distance. CONTROLS WASPS AND HORNETS: Designed to kill wasps, hornets, mud daubers, yellow jackets and other listed insects. USE OUTDOORS: Focus spray on the nest at sunset when insects are least active. GUARANTEED: Guaranteed to work or your money back. See product label for details.