Rat MASTER is a unique herbal, non-toxic, user-friendly Aerosol. When sprayed as instructed it prevents rats from nesting and visiting unwanted areas, Rat MASTER Repellent drives away mice and rats without harming or killing them. Being a repellent, it prevents the hazards of killing rats, and emotional or environmental concerns. The application of Rat MASTER Repellent temporarily affects the mucous membranes of rodents imitating them and driving them away effectively. Lasts up to 3 months. Usage Instructions:Spray RAT MASTER Aerosol using its Navigator Pipe, which reaches all difficult areas directly. Generally, these areas would be along walls, narrow openings, corners, and areas where rats can hide. If your car has any cables running underneath it, please use the spray over those cables as well. Wash your hands with soap after use to clear the bitter taste from any spillage on your hands. If the engine is pressure-washed or the vehicle is serviced, spray RAT Master again.