St Gabriel Organics® Insect Dust - Diatomaceous Earth - 4.4lb Ready to Use Dust Intended for application with hand duster, powder duster or bulbous duster. Kills all crawling insect such as fleas, cockroaches, ants, millipedes, centipedes and crickets. Can be used indoors or outdoors. Apply lightly and uniformly as a barrier around foundations, patios, porches and pools. Use indoors in kitchen, corners, under appliances and behind baseboards. Also for use outdoors: dust around patios, window sills and door frames, along ant trails and sewer pipes and foundations. 100% food grade diatomaceous earth.