Diatom Dust, 5 lb bucket

Diatomaceous Earth (including silicon dioxide, other oxides and moisture)...100%

This product kills insects mechanically by removing the waxy coating on their shells. Hence, insects cannot develop immunity to it. It remains effective as long as it is present. This is a food grade product and will not harm the animals and birds in your environment. Linda says: I have used DE for years and highly recommend it to control fleas, roaches and other creepy crawling insects.