SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/swim-no-waterproof-sunscreen

Is there such a thing as waterproof sunscreen?

No. All sunscreens eventually wash off.

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  1. Yes, any sunscreen with SPF 50 or higher
  2. Yes, if it says sport on the bottle
  3. No, all sunscreens eventually wash off ✔

Why: The FDA says no sunscreen is waterproof. Some are labeled water resistant, but every sunscreen wears off in the water, so you have to reapply it.

Huh, didn't know that: The FDA says an average sized adult or child needs about one ounce of sunscreen, about a shot glass full, to cover the whole body.

The dad joke
Why did the sun not go to college? It already had a million degrees.
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References

Answer: No, all sunscreens eventually wash off. The FDA says no sunscreen is waterproof. Some are labeled water resistant, but every sunscreen wears off in the water, so you have to reapply it.

  1. FDA: Sunscreen, How to Help Protect Your Skin from the Sun www.fda.gov/drugs/understanding-over-counter-medicines/sunscreen-how-help-protect-your-skin-sun
    No. There’s no such thing as "waterproof" sunscreen.
    Checked 2026-10-12.

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