Black Flag 17.5 oz. Aerosol Ant & Roach Killer. This fast-acting, unscented insecticide kills ants and roaches on contact. It is also effective against crickets, fleas, spiders, and other pests. The aerosol can is easy to use and does not leave a mess or stain. It keeps killing German cockroaches for up to 3 months. Use along and behind baseboards, beneath and behind sinks, stoves, refrigerators, and cabinets, around plumbing and other utility installations, around waste containers, and wherever else these pests may find entrance. When treating for ants, spray around door and window frames, other entry points, and trails. To treat fleas and brown dog ticks, spray infested areas such as pet beds and resting quarters. Remove old pet bedding and clean or replace with clean, fresh bedding. Pets should not be treated with this product.