10. You don’t need to reapply waterproof sunscreen.
The FDA doesn’t allow sunscreens to claim that they’re completely waterproof. Some are more resistant to water and perspiration than others but bottom line is, you need to keep reapplying to get full protection.
11. Sunscreen starts working right away.
It takes 20 minutes after application for sunscreen to be absorbed into the skin. Don’t wait till you get to the beach or bike trail to apply sunscreen. Slather on the sunscreen and give it time to soak in heading out.
