If you want to use this product as a sunscreen, you have to apply it liberally 15 minutes before you get in the sun and then again every 2 hours. If you are using it as a crme foundation, one application is enough for 16 hours of lasting flawless skin. It hydrates continually and is great for sensitive skin. If you are using this as a foundation, make sure you set it with the pressing powder to keep it going for 16 hours.