Bonide PRODUCTS 629 Hornet/Wasp Killer, 15-Ounce 15 oz. Aerosol Hornet, and Wasp Killer Water-based product that kills with a smothering foam action to stop insects from swarming out of nest This is a triple action insecticide, that provides instant knock down, quick kill, and prevents re-nesting for up to 4 weeks Spray will reach nests up to 20 feet off the ground Formula is non-staining on siding or roof