Black Flag Ant & Roach Killer Crack and Crevice Aerosol, Lemon Scent, 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.