Deadfast Ant Killer Plus Spray kills ants on contact. With long-lasting protection, it is ideal for use indoors and outdoors. The formula stays active for three months, with the micro-capsules sticking to the ant's body which is then carried back to the nest for total control. This ready to use spray also kills cockroaches. The micro capsules provide a slow release action, allowing ants to carry the poison back to their nest. It kills on contact and provides a three months long-lasting effect.