Control the roaches you dont see with Raid Roach Gel. Use in hard to reach indoor places like cracks and crevices, in corners, along walls, and near entry points to kill roaches where they hide. Kills cockroaches (including German and American). The gel starts working in hours and kills all common household roaches. Avoid placing the gel directly on top of surfaces treated with a Raid Ant & Roach Killer or Raid Max Roach killer spray product. This will inhibit the gel's effectiveness.