3s cockroach repellent gel is non - toxic, non carcinogenic and is safe to apply with hands.Instruction for Use :This gel is to be applied to every nook and corner of the house, where you think is the hiding place of the cockroaches. In the kitchen apply gel down side of drawers, cupboards, wash basin, kitchen platform, cabinets, under the freezer, oven, hinges of the doors and even in the food chambers. Application has to be made every 6 months or 3 months (in case of poor sanitation). No need of pest control. Hassel free and 100% guaranteed.