The unique combination of ingredients in this all-natural repellent irritate and confuse a snake's sense of taste and smell. When these senses are baffled, the snake is unable to gather information about its surrounding environment, fording it to look elsewhere to survive. It's timed-release biodegradable formula makes this repellent highly effective and long lasting. Comes in an easy to use shaker bottle. All natural - Napthalene Free.