Wilson® WASP OUT® Wasp & Hornet Killer is a pressurized insecticide spray that will help you get rid of wasp, hornet and yellow jacket nests safely and effectively. It is designed for outdoor use on exposed nests, in places such as under eaves, close to window frames and doorways, carports, picnic areas and playgrounds. Its action is both immediate and residual, and it can also be used to kill individual wasps outside the nest.