Keep ants from entering your house with TERRO 19 oz Outdoor Ant Killer Spray. This product provides instant knockdown and long-term control against ants and other unwanted home invaders- including carpenter ants, carpenter bees, Asian lady beetles and boxelder bugs. When sprayed, the product expands upon hitting the target surface and leaves an invisible residual deposit to kill ants and other pests. The ant killer spray is ideal as a perimeter barrier around foundations, doors and windows. An easy-to-use, powerful spray nozzle allows you to deliver barrier spray in hard-to-reach places up to 10-15 ft away. TERRO Outdoor Ant Killer is especially useful outside in early spring when ants emerge and attempt to enter the house. Use again in the fall when ants attempt to come inside for the winter.