Repellents - American Mosquito Control Association
A 10% DEET-based repellent will typically last 90 minutes or so. A 30% product will last 5-6 hours. Wash repellent-treated skin after coming indoors. If a suspected reaction to insect repellents occurs, wash treated skin, and call a physician. Keep the repellent container so that you can tell the physician exactly what product you are using.