Victor 28 lb Snake-A-Way Snake Repelling Granules repel garter snakes, rattlesnakes, and other species from areas they are not wanted. This granular snake repellent is applied around the perimeter of large-scale area you want to protect. Snake-A-Way is detected by the snake's Jacobson's Organ (auxiliary olfactory sense organ) and disrupts its sensory reception. This disorientation causes the snake to slither away unharmed, in search of fresh air. Wearing gloves, apply the granules to the perimeter of the area that you want protected. Place bands 4-5 inches wide to repel garter snakes, and 8-12 inches wide to repel rattlesnakes. For yard application, sprinkle Snake-A-Way throughout the area within the perimeter. When odor becomes faint, simply reapply .This product contains naphthalene (7%) and sulfur (28%) as its active ingredients.