Reapply sunscreen every two hours - immediately after water and sweat

Paris - 02.08.2026: Sunscreen should be reapplied approximately every two hours during extended periods outdoors. However, this widely used guideline is no guarantee that the protective layer will remain fully intact for that long. As Franceinfo explains, citing French health recommendations, actual protection also depends on whether the skin comes into contact with water, sweats heavily or is dried off.After swimming, sunscreen must therefore be reapplied immediately. This also applies to products labelled water-resistant. French health insurance provider Assurance Maladie points out that such a label does not promise unchanged ...