Water resistant
Also called: Water-resistant sunscreen
Water resistant means a sunscreen has been tested to keep its labeled SPF after water exposure for a stated time, usually 40 or 80 minutes in US labeling. It does not mean waterproof.
At a glance
- US labels must state 40 minutes or 80 minutes when a sunscreen is water resistant.
- Water resistant does not mean waterproof or sweatproof.
- You still need to reapply after swimming, sweating, towel drying, and time.
On this page
The short answer
Water resistant is a tested sunscreen label claim. US sunscreen rules specify labels such as "Water Resistant (40 minutes)" or "Water Resistant (80 minutes)" when the product meets the relevant water resistance testing[1].
It does not mean the sunscreen has become immortal. Sadly, no bottle has achieved that level of drama.
What the label does and does not promise
The FDA tells consumers that no sunscreens are waterproof and that all sunscreens eventually wash off[2]. Water resistant only tells you the tested time window.
It is helpful for beach days, sport, and sweating. It is not permission to apply once and forget the sun exists.
What to do with this
If you will swim or sweat, choose water resistant sunscreen and follow the reapplication directions. If your day is mostly indoors, comfort may matter more, because the sunscreen you actually wear wins.
Keep reading
Common questions
Does water resistant mean waterproof?
No. The FDA says sunscreens are not waterproof. Water resistant products still wash off eventually.
Should I choose 40 or 80 minutes?
For swimming, heavy sweat, or long outdoor activity, 80 minutes gives more practical margin. For normal daily use, texture and consistency may matter more.
Citations
- 21 CFR 201.327: OTC sunscreen required labeling - Electronic Code of Federal Regulations
- FDA: Sunscreen: How to Help Protect Your Skin from the Sun - U.S. Food and Drug Administration