Black Flag Ant and Roach Killer Aerosol Spray, Unscented, 17.5-Ounce USE INDOORS: Protects your home from ants, roaches and other listed insects. KILLS FAST: Controls listed insects on contact. KILLS UP TO 16 WEEKS: Keeps killing roaches, ants (excluding pharaoh and fire), silverfish and crickets. NON-STAINING: Water-based, formula with a lemon scent. GUARANTEED: Guaranteed to work or your money back. See product label for details. Kills on contact Keeps killing german cockroaches for up to 3 months No mess formula Non-staining