A moisture-resistant bait that can be used indoors and outdoors to control ants, silverfish, roaches, crickets, and more. Do not degrade from heat or sunlight and will last through four inches of rain. Is the one bair that will continue to work because Niban has no known resistance and is virtually odorless. It kills the microorganisms in the insect's stomach and blocks enzyme production casuing starvation. Since it affects none of the insect's major systems, they can't develop resistance.