The Mosquito Sentry 1 Gal. Natural Ready-to-Use Repellant is a blend of 100% green, natural plant oils, so you can safely enjoy your deck or patio without mosquitoes. Simply pour this repellent into the Mosquito Sentry Repellent System (not included) to quickly repel pests. The repellent's all-natural formula is designed for safe use around people and pets.