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Written by OSEA Staff | Last Updated on: May 5, 2026.
There’s one undisputed fact when it comes to SPF—wearing sunscreen is essential to reducing the risk of visible signs of sun damage. But when it comes to choosing the right formula, how much to apply and when to reapply, there’s a lot of misinformation. To separate fact from fiction, we’re shedding light on some of the biggest myths and misconceptions about sunscreen and our mineral Marine Screen SPF 50. Let’s get into it:
Myth:
“SPF 100 works twice as well as SPF 50.”
Fact:
SPF 50 blocks about 98% of UVB rays, so anything higher offers only a minimal increase in protection.
Myth:
“You don’t need sunscreen on cloudy days.”
Fact:
UV rays reach your skin even when the sky is overcast, which is why SPF matters every day of the year.
Myth:
“You only need SPF when you’re outside.”
Fact:
UVA rays can penetrate through windows and reach your skin even indoors. Daily SPF helps protect against long-term damage like premature aging and discoloration.
Our Marine Screen SPF 50 is the essential final step in your daily routine—even when you’re staying in.
Myth:
“You only need to apply sunscreen in the morning.”
Fact:
Sunscreen should be reapplied at least every two hours to maintain full SPF protection.
Myth:
“Mineral sunscreen is greasy.”
Fact:
Marine Screen SPF 50 is formulated with an olive-derived natural silicone alternative that helps deliver a non-greasy, lightweight texture that melts into skin and blends easily.
Myth:
“Mineral SPF is always thick and chalky.”
Fact:
While traditional mineral sunscreens have been known to feel thick or leave a chalky finish, newer formulas can offer a more lightweight, feel-good experience. Marine Screen SPF 50 blends easily into skin with a non-greasy, breathable feel—wearing more like skincare than sunscreen.
Myth:
“Sunscreen is unsuitable for sensitive skin.”
Fact:
Zinc oxide, the active ingredient in many mineral sunscreens, is less likely to cause irritation, making it a great option for sensitive skin types.
Our Marine Screen SPF 50 features non-nano zinc oxide, a clean, eco-friendly mineral shield against UVA + UVB rays. The formula is fragrance-free and safe for sensitive skin.
Myth:
“Mineral sunscreen can be 100% invisible.”
Fact:
While there have been advancements in SPF formulation, mineral sunscreen can never be 100% invisible. Mineral filters like zinc oxide and titanium dioxide are naturally white powders that sit on top of the skin to form a physical barrier, making it impossible for mineral SPF to be completely invisible across every skin tone.
Our Marine Screen SPF 50 uses non-nano zinc oxide and was formulated to be lightweight, hydrating, and blendable to help minimize the look of white cast. Pro tip: It blends best when warmed and pressed into well-hydrated skin. We tested the formula across the Fitzpatrick skin tone scale to help ensure it blends as seamlessly as possible.
Myth:
“A little sunscreen goes a long way.”
Fact:
Most people don’t apply enough SPF to get the level of protection listed on the label. For SPF 50, that means about 2 mg per cm² of skin—roughly a nickel-sized amount for the face, applied evenly.
Myth:
“If you have oily or acne-prone skin, skip SPF.”
Fact:
Daily SPF is essential for every skin type. It’s the single most important thing you can do for your skin. Marine Screen SPF 50 was formulated to be lightweight, breathable and non-greasy for all skin types.
Myth:
“You can mix sunscreen with your moisturizer.”
Fact:
Mixing sunscreen with moisturizer can dilute and impact the efficacy of sun protection. Marine Screen SPF 50 is meant to be applied as the final step in your skincare routine, worn over your moisturizer.
Don’t let sunscreen myths stand between you and the protection your skin deserves. Marine Screen Face SPF 50 is a daily mineral sunscreen for the sun you live in, made to fit seamlessly into your daily rituals as the final step in your skincare routine. Shop it here.