Seems to me like we should’ve easily invented something that lasts indefinitely by now
In: Chemistry
It depends upon the sunscreen. Additionally, the US government doesn’t allow the better sunscreen protection and limits how long the manufacturer can state it lasts before needing re-application.
There are sunscreens that will last all day without reapplication and they used to be labeled as such. The FDA created new rules for labeling so manufacturers can no longer claim 24 hour protection. They still protect for 24 hours, however. The problem is, you don’t know which sunscreens those are. From my experience, they are typically the ones in the aluminum spray bottles that spray a fine mist. They stay on my skin for days and no amount of washing removes than. If I spray it on a Monday morning and I’m out in the hot sun all day Monday, Tuesday and Wednesday, I find that I’m still protected without reapplication.
I have very fair skin and without sunscreen, I’ll be red after an hour in the sun and I’ll be burned to a crisp within 2 hours in the sun so I can attest to the fact that these particular sunscreens do last a long time.
Latest Answers