Contains insect growth regulator. Prevents reinfestation of cockroaches for up to 6 months. Keeps working on cockroaches for 6 months. 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. Guaranteed to work or your money back. Guarantee: If you are not completely satisfied with this Bengal Product, call 225-753-1313 weekdays 8:30am - 4:00pm Central Time. www.bengal.com.