Raid Ant & Roach Killer kills fast on contact and keeps killing with residual action for up to four weeks. The easy-to-use spray ensures complete coverage of the areas ants, roaches and other listed bugs may be infesting. It leaves no lingering chemical odor. Kills on contact. Kills for up to four weeks. No lingering chemical odor. -Ants, Crickets, Multi-Colored Asian Lady Beetles, Roaches, Silverfish, Spiders, Waterbugs-