Contains insect growth regulator. Prevents reinfestation of cockroaches for up to 6 months. flushes & kills. Kills roaches as they hatch. Innovative dry spray. No odor. No mess. No roaches. Bengal Gold Roach Spray prevents nymphal cockroaches from becoming egg-laying adults. Powerful flushing action drives insects out of hiding and kills them. One treatment does it all - flushes and kills.