Raid Ant & Roach Killer 26 has a special formula that kills on contact and keeps killing with residual action for up to 4 weeks. This easy-to-use roach spray can be applied to surfaces where ants, roaches and other listed bugs may be infesting. Kills a wide variety of insects including Roaches, Ants, Silverfish, Crickets, Earwigs, Household Spiders, Multicolored Asian Lady Beetles, Stinkbugs.