Bengal Roach Spray II delivers a dry spray that penetrates deep into cracks and crevices to kill roaches where they hide. Using the provided extension tube, it can be applied behind sinks, baseboards, doors, windows, appliances, cabinets, attics, and crawl spaces. The formula leaves no mess or odor, kills up to 20 times more roaches, and helps maintain a bug free home. Retreat every four weeks if needed.