Apply AHC Masters Mela Protect Waterfull Sunscreen as the last step of your morning skincare routine. Dispense a fingertip amount of product, then spread evenly over the face and neck, 15 to 20 minutes before sun exposure. Focus on sensitive areas (cheekbones, forehead, nose). Reapply every 2 to 3 hours if you are exposed to the sun for a long time or after sweating.