For Household Use Only. Kills on contact! New formula! No lingering chemical odor. Raid Ant & Roach Killer 17 Kills Roaches in Two Ways: 1) It kills bugs fast - on contact and 2) It keeps on killing with residual action even after you spray, for up to 4 weeks. Contains no CFCs or other ozone depleting substances. Federal regulations prohibit CFC propellants in aerosols.