Most swimmers apply sunscreen before they get in the water. Most swimmers also end up with a sunburn anyway.
The problem is not that they forgot. The problem is that standard sunscreen was never designed for what swimming actually puts it through.
What Happens to Sunscreen in the Water
The moment you enter the water, your sunscreen starts coming off. Not all at once, but consistently, with every stroke, every turn, every minute of immersion.
Water dilutes the formula. Friction from movement accelerates the breakdown. The warmth of your skin and the sun above speed the process further. By the time most swimmers have finished a meaningful training set or a race leg, the protection they applied on the pool deck is largely gone.
The FDA's highest water resistance rating is 80 minutes. That is not a guarantee of protection for 80 minutes. It means a formula was tested under controlled conditions and retained some of its SPF rating at that point. Real swimming conditions are significantly more demanding.
For competitive swimmers, triathletes, open water athletes, and anyone spending serious time in the water, 80-minute resistance is not enough.
Does Sunscreen Wash Off While Swimming?
Yes. Most of it does, faster than the label suggests.
The rate depends on the formula, how much you applied, how vigorously you are swimming, and how long you are in the water. Splashing around for 20 minutes is different from doing 3,000 meters of freestyle intervals. Open water is different from a pool. Racing is different from casual laps.
For any swim lasting more than an hour, a standard sport sunscreen needs to be considered mostly gone by the time you are done.
What Swimmers Actually Need
True water resistance comes from how the formula bonds to the skin, not just what ingredients are in it. A sunscreen that stays on through prolonged immersion requires technology engineered specifically for that purpose.
SolRX worked with AMA Testing Labs to develop a water resistance standard that goes well beyond the FDA 80-minute benchmark. The requirement was simple: the formula had to maintain its SPF rating after 8 continuous hours of water immersion.
AMA Labs confirmed that SolRX Waterblock lotion formulas maintain 97% or more of their SPF protection after 8 hours in the water. That is not a marketing claim. It is an independently verified test result.
For swimmers doing 90 minutes to 4 hours in the water, that difference is everything.
Broad Spectrum Coverage for Swimmers
UV exposure in and around water is more intense than most people realize. Open water reflects UV rays from below as well as above, meaning exposure is coming from multiple angles at once. Pools create a similar effect with light bouncing off the water surface.
All SolRX Waterblock formulas are broad spectrum, protecting against both UVA and UVB rays. UVA rays penetrate deeper into skin, causing long-term damage and premature aging. UVB rays cause burning. Serious swimmers need real protection against both.
Reef Safe for Open Water
Open water swimmers and triathletes compete in oceans, lakes, and natural waterways. The sunscreen you wear washes into that environment. Oxybenzone and octinoxate, two of the most common chemical UV filters, are strongly linked to coral reef damage.
Every SolRX formula is oxybenzone free and octinoxate free. Because Waterblock technology keeps the formula on your skin rather than washing off, it is one of the most reef-responsible choices for any water-based athlete. SolRX is also Hawaii Act 104 compliant.
Application Tips for Swimmers
Apply at least 15 minutes before entering the water so the formula can fully bond with the skin before immersion.
Use more than you think you need. A thin application reduces effectiveness significantly. Most adults need about one ounce for a full body application.
Pay close attention to the back of your neck, shoulders, and the backs of your legs. These are the areas most exposed during freestyle swimming and the areas most people miss.
For open water and triathlon events, use the lotion formula for pre-race coverage. For transitions and mid-race reapplication, the spray is the fastest option.
Even with Waterblock formulas, reapply after towel drying on multi-session training days.
After Your Swim: The Step Most Swimmers Skip
Sunscreen gets you through the water. But what your skin needs after is a different problem entirely.
Extended time in the water, especially in the sun, depletes skin moisture, generates free radical activity from UV exposure, and stresses the skin barrier. Chlorine adds its own layer of dryness and irritation. Open water adds wind and salt.
SolRX Hydrating Hemp Aftersun was built for exactly this moment. Hemp seed oil delivers anti-inflammatory support. Shea butter restores the skin barrier. Argan oil replenishes moisture at the cellular level.
Apply it within 30 minutes of finishing your swim, ideally after a quick rinse while skin is still slightly damp. Think of it the same way you think about a recovery drink after a hard set. Your skin worked hard out there. Give it what it needs.
The Right Formula for Every Swimmer
For prolonged immersion, the Waterblock lotion range is the right choice. Independently tested for 8-hour water resistance and the formulas used by competitive swimmers and triathletes.
For everyday training swims, the spray formulas offer fast, convenient coverage that is oxybenzone free and reef safe.
For the face, nose, and ears, the Zinc Stick stays put through full immersion and will not migrate into your eyes during a race.
Shop SolRX WATERBLOCKPremium sport sunscreen tested to maintain SPF after 8 hours in the water. Broad spectrum, reef safe, oxybenzone free. The choice for serious swimmers. |
Frequently Asked Questions
Does sunscreen stay on in the pool?
Most standard sunscreens wash off significantly in pool water. The FDA's highest water resistance rating is 80 minutes under controlled testing conditions. In real pool conditions with active swimming, the protection degrades faster. SolRX Waterblock lotion formulas are independently tested by AMA Laboratories to maintain 97% or more of their SPF rating after 8 continuous hours of water immersion.
What is the best sunscreen for swimming?
The best sunscreen for swimming is a broad-spectrum SPF 50 lotion with extended water resistance, a formula that does not run into the eyes during activity, and reef-safe ingredients if swimming in natural water. SolRX Waterblock lotion sunscreens are independently tested for 8-hour water resistance -- six times the FDA maximum standard -- making them the most water-resistant lotion formulas available.
How long does sunscreen last in the ocean?
Standard water-resistant sunscreens last between 40 and 80 minutes in the ocean before their SPF protection begins to degrade. Ocean conditions -- including saltwater, UV reflection off the water surface, and physical activity -- accelerate formula breakdown. For swims lasting longer than 80 minutes, you need a formula specifically engineered for extended immersion. SolRX Waterblock maintains SPF protection for 8 hours of continuous water exposure.
Is waterproof sunscreen better for swimming?
Technically, no sunscreen is waterproof. The FDA banned the term waterproof from sunscreen labels in 2013 because no formula is completely impervious to water. What people call waterproof sunscreen is water-resistant sunscreen, with the highest FDA-recognized rating being 80 minutes. SolRX Waterblock goes beyond the 80-minute standard with independently verified 8-hour water resistance -- the closest thing to genuinely waterproof available.
How often should swimmers reapply sunscreen?
Swimmers should reapply every 2 hours during sun exposure and immediately after towel drying. For competitive swimmers in multi-hour events, a formula with extended water resistance is essential to maintain protection without constant reapplication during activity. SolRX Waterblock's 8-hour water resistance rating significantly reduces the need for mid-swim reapplication compared to standard 80-minute formulas.
What sunscreen should I wear in the ocean?
For ocean swimming, choose a reef-safe sunscreen that is free from oxybenzone and octinoxate -- the two chemical UV filters most strongly linked to coral reef damage and banned in Hawaii, Palau, and other reef-protected destinations. SolRX formulas are oxybenzone-free, octinoxate-free, and Hawaii Act 104 compliant. Because Waterblock technology keeps the formula on your skin rather than washing off, it is one of the most reef-responsible choices for ocean athletes.
Can I swim in a pool with sunscreen on?
Yes. You should always wear sunscreen when swimming in an outdoor pool. Chlorinated pool water does not prevent UV damage -- the sun's rays reach you regardless of whether you are in a pool or the ocean. Pool conditions can actually accelerate sunscreen degradation, so a water-resistant formula is important. Zinc oxide-based sunscreens are generally gentler on pool water chemistry compared to heavy chemical filter formulas.
Does sunscreen affect pool water?
Conventional sunscreens containing heavy chemical filters can contribute to pool water chemistry imbalances when they wash off swimmers. Mineral sunscreens with zinc oxide are generally considered gentler on pool chemistry because they work by sitting on the skin surface rather than being absorbed. SolRX mineral formulas and Waterblock formulas are designed to stay on the skin -- the same property that makes them effective for swimmers also means less formula washing into the water.
Should swimmers use spray or lotion sunscreen?
For serious water exposure, lotion is the better choice. Lotion sunscreens provide more consistent coverage and are easier to apply thoroughly before entering the water. SolRX Waterblock 8-hour water resistance is specific to the lotion formulas. Sprays are ideal for quick reapplication between sets, during transitions, and for everyday use outside of competition. The zinc stick is the preferred choice for face, nose, and ears where runoff into the eyes is a concern.
Is SolRX sunscreen good for competitive swimmers?
Yes. SolRX Waterblock lotion formulas were specifically developed with competitive swimmers, triathletes, and open water athletes in mind. The AMA Laboratories testing standard -- maintaining SPF protection after 8 continuous hours of water immersion -- was designed to reflect real competition conditions, not just the FDA's controlled 80-minute test. SolRX Waterblock maintains 97% or more of its SPF rating through that 8-hour standard.
