TERRO Ant Dust kills many problem pests including: fire ants and carpenter ants, boxelder bugs, cockroaches, crickets, firebrats, spiders, ticks, wasps and silverfish. This unique, ready-to-use dust is waterproof and wont wash away in the rain. For use indoors or outdoors, Ant Dust kills on contact and provides up to eight months of protection. This product is ideal for crack and crevice treatments and can even be applied directly on top of fire ant hills. Using TERRO Ant Dust is a great way to prepare for future invasions as well as treating the pests at hand. This dust works its best when applied between 65 - 80 degrees Fahrenheit. Allow up to 3-4 days to see maximum results. If ants or other bugs are still active repeat application once more. The dust application will vary but the typical range for application is .5 lb of dust for every 1,000 square feet.