Understanding Water-Resistant Sunscreen: What You Need to Know

Waterproof sunscreen doesn’t exist. In 2012, terms like “waterproof, sweatproof, and sunblock” were banned from sunscreen labels by the FDA because they were found to be misleading. The reality is that no sunscreen can be completely waterproof or sweatproof. Instead, products can be labeled as "water-resistant" for either 40 or 80 minutes, meaning the sunscreen maintains its SPF level for the specified time while swimming or sweating.

For outdoor enthusiasts—beachgoers, swimmers, surfers, runners, hikers, and anyone who spends time in the water or exercises outside—knowing the limitations and benefits of water-resistant sunscreen is crucial for effective sun protection.

How Does Water Resistance Work?

To be labeled as water-resistant, a sunscreen must pass FDA testing in an independent laboratory. The process involves:

1. Applying the sunscreen to a participant's arm.
2. Submerging the arm in a jacuzzi for 40 or 80 minutes, simulating the effects of swimming or surfing.
3. Measuring the SPF level after the water exposure to ensure it matches the claimed protection.

Only sunscreens that retain their SPF after the designated time can be labeled as water-resistant - 40 mins or water-resistant - 80 mins.

Learn more about FDA sunscreen regulations here  (https://www.fda.gov/drugs/understanding-over-counter-medicines/questions-and-answers-fda-posts-deemed-final-order-and-proposed-order-over-counter-sunscreen)

Tips for Proper Sunscreen Use

No matter which sunscreen you choose, following proper application and reapplication guidelines is essential for maintaining protection:

• Apply Sunscreen 20 Minutes Before Sun Exposure: This allows the sunscreen to bind to the skin, ensuring maximum effectiveness.
• Reapply Every Two Hours: Even if you’re using a water-resistant sunscreen, reapply after being in the water or sweating, especially if you’ve toweled off.
• Use Broad-Spectrum SPF 30 or 50: Make sure your sunscreen protects against both UVA (aging) and UVB (burning) rays.

Check out BU Sunscreen’s range of water-resistant, broad-spectrum products here (https://www.busunscreen.com)

The Importance of UV-Protective Clothing

If you’re not a fan of using sunscreen or will be spending extended time in the water, consider UV-protective clothing. These garments provide reliable sun protection without the need for reapplication:

• UPF (Ultraviolet Protection Factor) measures fabric’s ability to block UV radiation, similar to how SPF measures sunscreen effectiveness.
  • UPF 30 blocks 96.7% of UV rays.
  • UPF 50 blocks 98% of UV rays.
  • UPF 50+ can indicate 99% protection.
• Long-sleeve UV shirts, hats, and sunglasses can keep your skin protected, but remember to use sunscreen on exposed areas like the face, ears, back of the neck, and hands.

Sweat and Water-Resistant Sunscreen for the Face

Many people prefer using a separate sunscreen for the face to avoid breakouts or irritation on more delicate skin. Whether you choose a cream, lotion, or spray, make sure it’s non-comedogenic and suitable for your skin type:

• Reapply according to the water resistance rating (40 or 80 minutes), or at least every two hours if you’re not in the water.
• Use broad-spectrum protection to shield against both UVA and UVB rays.

Explore BU Sunscreen’s facial sunscreens here (https://www.busunscreen.com)

The Two Numbers to Know: SPF and Water Resistance Time

When choosing a sunscreen, pay attention to two numbers:

1. SPF Rating: Indicates the level of UVB protection. SPF 30 blocks 96.7%, while SPF 50 blocks 98%.
2. Water Resistance Duration: Shows how long the sunscreen remains effective in water or while sweating (40 or 80 minutes).

For example, a broad-spectrum SPF 50 sunscreen with 80 minutes of water resistance provides 98% protection against UVA and UVB rays. However, if you’re in the water for longer than 80 minutes, you must reapply to maintain protection. Time flies when you’re having fun, so keep track!

Additional Sun Protection Tips

• Stay in the Shade During Peak Hours: Avoid sun exposure between 10 a.m. and 4 p.m., when UV rays are strongest.
• Use Accessories for Extra Protection: Wide-brimmed hats, sunglasses, and UV-blocking umbrellas can provide additional coverage.
• Drink Plenty of Water: Staying hydrated helps your skin maintain its protective barrier, especially in the heat.

Get the best water-resistant sun protection with BU Sunscreen's broad-spectrum products. Visit BU Sunscreen to find your perfect sunscreen for outdoor activities.

Learn more about sun safety and sunscreen regulations by visiting the FDA's website.