Big D Cockroach Gel Bait 2.5g is a ready to use insecticide dust that eliminates cockroaches. The product dissolves their gut membrane. Big D Cockroach Gel Bait 2.5g is a highly effective cockroach killer which is perfectly safe for use in kitchens, washrooms and food areas. Apply it in inaccessible places such as cracks, crevices, behind furniture, etc. In dark, damp places, under a sink, behind the toilet, close to drains and out of the reach of children. This product is highly effective in killing adult cockroaches.