P. F. Harris Mfg. HRS-32 Roach Killer, Quart (32oz), Clear Insects coming into contact with the powder will die within few hours after initial contact Continues to kill roaches, palmetto bugs, water bugs and silverfish for weeks after application as long as it's kept dry This product is manufactured in United States Apply as spot and crack &amp; crevice treatment to areas where roaches crawl and hide, especially in hidden areas around sinks and storage areas, behind baseboards, around windows and doors, and behind and under refrigerators, cabinets and sinks. Remove pets and make sure you cover your aquariums before spraying and allow all surfaces and areas to completely dry before pets or people come in contact.