Harris Home Pest Spray is perfect to use inside and outside for a broad spectrum of insects. Can be applied as a perimeter treatment. You will want to rake back mulch, debris, and leaf litter to expose the ground areas. Create a 12” band of perimeter spray around your entire home or structure.. Treat any and all entry points, such as door frames, window frames, cracks in structure, also weep holes. Insects coming into contact with the powder will die within few hours after Initial contact. Continues to kill roaches, Palmetto bugs, water bugs & silverfish for weeks after application as long as it's kept dry. This product is manufactured in United States.