Black Top aerosol insecticide is effective in killing cockroaches, ants, flying insects and many other household Pets. Besides spraying directly on the insects, it can help keep away pests by spraying the insecticide in a room with the windows closed. After closing the door for at least 10 minutes, you can re-enter the room. It is odourless and clourless, so it will not be irritating for the users.