Raid Ant & Roach Killer 26 has a formula that kills on contact and keeps killing with residual action for up to 4 weeks* * Roaches and Carpenter ants. Take back your home with this easy to use ant & roach spray. It can be applied to surfaces where ants, cockroaches and other bugs are found. Kills a wide variety of insects including cockroaches, ants, silverfish, crickets, earwigs, household spiders, multicolored Asian lady beetles and stinkbugs.