The active ingredient in this special roach control product is Hydroprene insect growth regulator (IGR) - a biorational insecticide similar to insect growth hormones that occur naturally in roaches. Gentrol is unique in that it controls roach populations by inhibiting reproduction. For faster results, use Maxforce Roach Gel along with the Gentrol. Gentrol is labeled for restaurants, homes, kitchens, nursing homes, hospitals, and lots of other places. Gentrol IGR Concentrate can be purchased as a Gentrol Point Source or Gentrol Aerosol.