Raid® Ant & Roach 26 kills roaches and ants on contact within 30 seconds and keeps killing roaches and carpenter ants with residual action for up to 6 weeks. Take back your home with this ant & roach spray.The insecticide can be applied to surfaces where ants, cockroaches and other bugs are found. The bug killer is effective against a wide variety of insects including cockroaches, ants, silverfish, crickets, earwigs, household spiders, multicolored Asian lady beetles and stinkbugs.