TERRO Granules Ant Killer creates a barrier against ants, fire ants, roaches, fleas, earwigs and more. Works within 24 hours to keep your home free of the most persistent insects. For increased effectiveness, this product can be applied as a perimeter treatment around the foundation of your home or spread on lawns. TERRO Ant Killer Plus comes in a resealable shaker bag to allow for easy application. There is no need to use a spreader. For outdoor use only.