Mortein Insecticide Mortein Insecticides provide a safe and effective way to get rid of all insects. Killing insects up to two times faster than regular insecticides. Mortein instant All Insect Killer (AIK) kills flying and crawling insects instantly on direct spray. This multi-functional insect killer eliminates insects with a single blast. It's designed to kill all crawling and flying insects inside your home instantly, leaving your home free of unwelcomed guests.