According to the FDA, sunscreen should be applied as follows:
Apply liberally and spread evenly by hand 15 minutes before sun exposure. Re-apply after 40 minutes of swimming, excessive perspiring, at least every two hours, and immediately after towel drying. Consult a physician for children under 6 months of age.
SUN PROTECTION MEASURES: Spending time in the sun increases your risk of skin cancer and early skin aging. To decrease this risk, regularly use sunscreen with a broad spectrum SPF of 15 or higher; limit the time in the sun, especially from 10AM-2PM; and wear sunglasses, hats, long-sleeve shirts, and pants. For children under 6 months of age, consult a dooctor.
WARNINGS: Do not use on damaged or broken skin. When using this product, keep out of eyes. Rinse with water to remove. Stop use and ask a doctor if rash occurs.
Note that we recommend applying the Smooth Shade Tint underneath makeup, in the morning, as a makeup primer.