Sniff 'n' Stop Deterrent Granules are great for outdoor use to deter pests. Sprinkle around RV tires or picnic bench legs to keep ants and other pests from invading. Sniff ‘n’ Stop is made up of essential oils that are encapsulated, amplified and time-released from inside a negatively charged polymer. The negatively charged molecules are drawn to positively charged “pests” like a magnet. Confused, the pests release pheromones to warn others of their same species to stay away!