Round Lab Birch Juice Mild-Up UVLOCK Sun 50ml
$13.00
Sale price
$13.00
Regular price
$24.99
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Round Lab Birch Juice Mild-Up UVLOCK Sun 50ml
$13.00
Sale price
$13.00
Regular price
$24.99
MIMO PickFor sensitive skin, or anyone who prefers mineral filters
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$9.99MSRP $24.9960% off
Elsewhere:Amazon (Black Friday 2025) $16.97(checked Oct 29)
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Pickup available at MIMO MART (BUENA PARK)
Usually ready in 24 hours
- Free pickup in Buena Park. Choose pickup at checkout (store open Mon–Sat, 10–5).
- Free US shipping on orders over $50.
- 14-day returns on unopened, sealed products. Details
- Questions? Call the store: (714) 735-0077
Broad Spectrum SPF 50+ · 100% Mineral Filter · Zinc Oxide 17%
The Gentle Sunscreen
Your Reactive Skin Has Been Waiting For.
Your Reactive Skin Has Been Waiting For.
A 100% mineral sunscreen built entirely on Zinc Oxide — the same mineral filter many people with sensitive skin choose. No chemical filters, just a mineral filter that sits on top of skin, softened with birch sap and hyaluronic acid.
Broad Spectrum SPF 50+ 100% Mineral — Zinc Oxide Only No Chemical Filters Mineral Filter for Sensitive Skin Birch Juice + Hyaluronic Acid US Drug Facts Label
What It Is
ROUND LAB Birch Juice Mild-Up UVLock Sunscreen SPF50+ is a 100% mineral (physical) sunscreen, using Zinc Oxide 17% as its only active ingredient. Unlike chemical sunscreens that absorb into skin to work, this formula sits on top of the skin's surface and physically reflects UV rays away — a big reason mineral formulas are popular with sensitive-skin shoppers. Birch sap, hyaluronic acid, and antioxidants keep the formula hydrating rather than chalky or drying, and it's sold in the US as an OTC sunscreen. 50ml / 1.69 fl oz.
Active Ingredient (U.S. Drug Facts)
Drug Facts — Active Ingredient
| Zinc Oxide 17% | Sunscreen — Broad Spectrum UVA + UVB Protection |
Use: Helps prevent sunburn. If used as directed with other sun protection measures, decreases the risk of skin cancer and early skin aging caused by the sun.
Why Mineral (Physical) Sunscreen? What That Means For Your Skin
This is a 100% mineral sunscreen — a gentle-feeling category of SPF
- Sits on top of skin instead of absorbing in. Zinc Oxide works by forming a physical shield on the skin's surface that reflects and scatters UV radiation, rather than being absorbed into skin like chemical filters. It's a key reason many people with reactive skin prefer mineral formulas.
- A mineral-only option. Zinc oxide is the only active ingredient. Pregnant or breastfeeding? Ask your doctor which sunscreen suits you.
- Designed to feel gentle on sensitive, easily reactive skin. Many people find mineral filters less likely to sting than chemical filters, especially around the eyes.
- Comforting by nature. Zinc oxide also has a calming feel on skin, on top of its UV-filtering role — a comfortable pick for sensitive or breakout-prone skin.
- Photostable mineral filter. Zinc oxide doesn't break down in sunlight the way some chemical filters do, so no added stabilizer is needed. Still reapply at least every 2 hours.
Mild-Up (Mineral) vs. Moisturizing (Chemical) — Which One Should You Buy?
| Factor | Mild-Up (This Product) | Moisturizing UVLOCK |
|---|---|---|
| Filter type | 100% Mineral — Zinc Oxide 17% | Chemical — Avobenzone, Homosalate, Octisalate |
| How it works | Sits on skin, reflects UV rays | Absorbs into skin, converts UV to heat |
| Best for sensitive/reactive skin | Yes — mineral filter | May sting some reactive skin |
| Texture | Slightly richer, creamier finish | Lighter, more watery/serum-like |
| White cast | Minimal (formulated to blend), some may notice slight cast on deeper tones | No white cast |
| SPF rating | SPF 50+ | SPF 45+ |
| Good under makeup | Yes, slightly heavier base | Yes, lighter base |
| Best skin type match | Sensitive, reactive, acne-prone | Normal, dry, dehydrated skin |
Bottom line: if your skin reacts easily or you prefer to avoid chemical UV filters, choose Mild-Up. If your skin tolerates chemical sunscreen well and you want the lightest possible texture, choose the Moisturizing UVLOCK.
Perfect For
- Sensitive or easily reactive skin
- Skin prone to the look of redness
- Shoppers who prefer mineral-only SPF
- Sensitive, easily flushed-looking skin
- Blemish-prone skin
- Anyone avoiding chemical UV filters
- Customers who've had eye stinging from chemical SPF
Texture, Finish & Feel
Creamy, Cushioned Feel
Slightly richer than a chemical sunscreen, formulated with silicones and emollients to glide on smoothly rather than sit heavy or chalky.
Soft-Focus Finish
Minimal cast thanks to a refined zinc oxide particle size — a noticeable step up from older, thicker mineral formulas.
Calm, Non-Stinging
No chemical filters, so it's less likely to sting eyes or feel hot on reactive skin.
Skincare Actives — Beyond the SPF
Birch Tree Sap (Betula Platyphylla Japonica Juice) Soothing
The signature ingredient of this line. Rich in minerals, enzymes, and antioxidants — helps reactive-feeling skin feel calm and hydrated.
Hyaluronic Acid + Sodium Hyaluronate Hydrating
Draws and holds water in skin, offsetting the slightly drying reputation older mineral sunscreens have earned.
Tocopherol + Ascorbic Acid Antioxidant
Vitamin E and Vitamin C add antioxidant support alongside the mineral UV filter.
Artemisia Annua Extract Calming
A botanical extract known for its soothing feel on reactive skin, reinforcing this formula's gentle positioning.
How To Use
1
Apply as the Final AM Skincare StepAfter cleansing, toner, and serum — sunscreen goes on last, before makeup.
2
Apply Before Sun ExposureApply liberally 15 minutes before sun exposure, as directed on the Drug Facts.
3
Use a Generous AmountApply approximately ¼ teaspoon (a nickel-sized amount) to the full face. SPF 50+ is only achieved at the tested volume.
4
Spread and Pat GentlySmooth across face and neck with fingertips. Pat in gently until fully absorbed.
5
Reapply Every 2 Hours OutdoorsAll sunscreens degrade with UV exposure. Reapply at least every 2 hours during direct sun exposure.
Pro Tips
- Pregnant or breastfeeding: Ask your doctor which sunscreen is right for you.
- Reactive skin: Patch test first, but zinc oxide's calming feel makes this a gentle-feeling SPF option.
- Deeper skin tones: Warm the product between fingertips before applying and blend in thin layers to minimize any cast.
- Layering: The creamy texture pats on easily for reapplication over makeup during the day.
- Double cleanse at night: Zinc oxide formulas still benefit from an oil cleanser first to fully remove the sunscreen layer.
Full Ingredient List (INCI — Inactive Ingredients)
Water, Cyclohexasiloxane, Butyloctyl Salicylate, Propanediol, Propylheptyl Caprylate, Isododecane, Caprylyl Methicone, Polyglyceryl-3 Polydimethylsiloxyethyl Dimethicone, Methyl Methacrylate Crosspolymer, Methyl Trimethicone, Disteardimonium Hectorite, Magnesium Sulfate, Triethoxycaprylylsilane, 1,2-Hexanediol, Polyglyceryl-2 Dipolyhydroxystearate, Polymethylsilsesquioxane, Lauryl Polyglyceryl-3 Polydimethylsiloxyethyl Dimethicone, Butylene Glycol, Betula Platyphylla Japonica Juice, Glyceryl Caprylate, Caprylyl Glycol, Ethylhexylglycerin, Artemisia Annua Extract, Anthemis Nobilis Flower Oil, Sodium Hyaluronate, Pinus Sylvestris Leaf Oil, Glycerin, Nelumbo Nucifera Leaf Extract, Cryptomeria Japonica Leaf Extract, Saccharomyces Ferment Filtrate, Tocopherol, Glyceryl Glucoside, Hyaluronic Acid, Ascorbic Acid.
Active ingredient is listed separately in Drug Facts above.
Product Details
| Brand | ROUND LAB (South Korea) |
| Product Name | Birch Juice Mild-Up UVLock Sunscreen |
| Net Weight | 50ml / 1.69 fl oz |
| SPF / Coverage | SPF 50+ · Broad Spectrum (UVA + UVB) |
| Sunscreen Type | 100% Mineral (Physical) — Zinc Oxide Only |
| Active Ingredient | Zinc Oxide 17% |
| Key Skincare Actives | Birch Tree Sap, Hyaluronic Acid, Tocopherol, Ascorbic Acid |
| Skin Type | All Skin Types · Especially Sensitive, Reactive |
| Finish | Creamy, soft-focus, minimal cast |
| Regulatory Status | OTC sunscreen · Broad Spectrum SPF 50+ (see Drug Facts) |
| Country of Origin | Republic of Korea |
| Usage | Morning (AM) · Final skincare step · Apply 15 min before sun · Reapply every 2 hours |
100% Authentic — Buyer Protection Notice All products sold through MIMOMART are 100% authentic and sourced directly from authorized distributors. Please be cautious of products priced suspiciously low or shipped from unauthorized third-party sellers — these may be counterfeit, tampered with, or expired. The ROUND LAB Birch Juice Mild-Up sunscreen sold here is the US version with an English Drug Facts label. Your skin deserves the real thing.