Ortho® Wasp B Gon™ MAX Wasp Killer Spray Aerosol helps take the sting out of dealing with wasp nests found in trees or attached to your home, shed, garage, or other outbuilding. This aerosol spray kills bees & wasps (including hornets and yellow jackets and hornets) in their nest – and keeps killing those that return to a treated nest. Lets you treat out-of-reach nests, too. For best results, spray at a safe distance from the nest, and spray when pests are at rest, usually in the early morning or late evening. Spray until the nest is saturated, then wait 48 hours before removing. Not for use indoors.