Deer Scram Professional Repellent Each application should last approximately 30 days; re-application may be required after periods of extremely heavy rain. Sprinkle liberally starting 15 from the edge of the landscaped area, making a 20 band around the perimeter. It's made from animal by-products to imitate the smell of a dead deer, which stimulates a sense of fear and a strong avoidance reaction. 10 lb.