Bengal gold roach spray goes beyond just killing roaches by offering long-lasting protection, preventing re-infestation for up to 6 months. with a 2% concentration of Permethrin, a highly effective insecticide, this dry, powerful spray penetrates deep into cracks, crevices and hard-to-reach areas to flush roaches out of hiding and eliminate them. Its advanced formula reaches behind walls and carries the killing agent deep into infestations for maximum performance and results.