Keep your outdoor surroundings free of wasps, hornets, and yellow jackets while spending less with the Bengal Foaming Wasp & Hornet Killer. Guaranteed for effective results, this 16-ounce aerosol foam bug killer spray traps wasps and hornets on the nest to ensure a wasp and hornet-free environment. With a foam-trapping action, the wasp killer quickly kills wasps and hornets on contact, and it has a powerful jet spray that can reach up to 25 feet. The water-based foam will kill insects returning to the nest for a thorough and optimal extermination performance. It's safe on most ornamental plants and shrubs and won't stain most home siding and asphalt shingles depending on the condition and cleanliness, so you can spray it without worry. Treating by soaking the nests during early morning or late evening hours will be the most effective because majority of the insects will be resting on the nest. The water-based foam wasp spray contains a 0.5% concentration of its active ingredient, Permethrin, an insecticide that is a powerful killing agent on flying insects. Do not spray this product on electrical equipment. If you need to treat areas with electrical equipment, use the Bengal Non-Conductive Wasp & Hornet Killer.