Ortho® Home Defense® Insect Killer for Indoor & Perimeter Concentrate kills common household bugs including the mosquito, cockroach, fly, ant, spider, wasp, cherry fruit fly, beetle, flea, tick, stink bug, and silverfish. This insect killer has been specifically formulated for indoor and outdoor use both as a preventative treatment and for when you see evidence of insect activity. Use with confidence in kitchens, bathrooms, basements, along doors and windows, on patios and decks, in garages, and along the perimeter of the foundation. For long-lasting, residual control, leave the applied spray undisturbed. With this long-lasting spray, you’ll have up to 12 months of protection from ants, roaches, and spiders (indoors on non-porous surfaces). Retreatment of this quick drying spray is recommended once per season (or every three months) in outdoor settings. Each 32 oz. container of Ortho® Home Defense® Insect Killer for Indoor & Perimeter Concentrate makes up to 4 gallons of non-staining and odor free bug killer which can be applied using a tank sprayer.