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
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 protective ingredient dermatologists recommend for pregnancy, rosacea, melasma, and post-procedure skin. No chemical filters, no absorption into skin, just a physical shield of protection sitting on top, softened with birch sap and hyaluronic acid.
Broad Spectrum SPF 50+
100% Mineral — Zinc Oxide Only
No Chemical Filters
Dermatologist-Recommended for Sensitive Skin
Birch Juice + Hyaluronic Acid
FDA OTC Registered
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 — the exact mechanism dermatologists point to when recommending sunscreen for pregnancy, sensitive skin, rosacea, and melasma. Birch sap, hyaluronic acid, and antioxidants keep the formula hydrating rather than chalky or drying, and it's FDA-registered as an OTC drug. 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 — the gentlest category of SPF that exists
- 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. This is the single biggest reason dermatologists reach for mineral formulas first for reactive skin.
- The first-choice sunscreen for pregnancy. Because zinc oxide isn't absorbed systemically, it's the sunscreen type most consistently recommended by OB-GYNs and dermatologists during pregnancy and breastfeeding.
- Lower irritation risk for sensitive, rosacea-prone, and allergy-prone skin. Mineral filters are less likely to trigger stinging, burning, or allergic reactions than chemical filters, and are the preferred choice for children's skin.
- Anti-inflammatory by nature. Zinc oxide itself has calming, anti-inflammatory properties on top of its UV-blocking function — genuinely useful for irritated, post-procedure, or breakout-prone skin.
- Photostable with no degradation. Zinc oxide doesn't break down in sunlight the way some chemical filters do, so there's no need for stabilizing ingredients or concerns about protection fading mid-day.
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 — dermatologist first choice | Can sting or irritate reactive skin |
| Pregnancy-friendly | Yes — no systemic absorption | Generally considered fine, but not the derm-preferred option |
| Texture | Slightly richer, creamier finish | Lighter, more watery/serum-like |
| White cast | Minimal (formulated to blend), some may notice slight cast on deeper tones | Zero white cast on any tone |
| SPF rating | SPF 50+ | SPF 45+ |
| Good under makeup | Yes, slightly heavier base | Yes, lighter base |
| Best skin type match | Sensitive, reactive, rosacea, acne-prone, pregnant | Normal, dry, dehydrated skin |
Bottom line: if your skin reacts easily, you're pregnant, or you've been told 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, reactive, or allergy-prone skin
- Rosacea and redness-prone skin
- Pregnant and breastfeeding customers
- Melasma and pigmentation-prone skin
- Acne-prone and post-procedure skin
- Children (with guardian supervision)
- Anyone told to avoid 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 means no eye-stinging risk and a lower chance of the burning sensation reactive skin gets from some SPFs.
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 calm and hydrate skin already prone to reactivity.
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 work alongside the mineral UV shield to help neutralize free-radical damage from residual light exposure.
Artemisia Annua Extract Calming
A botanical extract known for its soothing effect on irritated or 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
Mineral Sunscreen Works ImmediatelyUnlike chemical filters, zinc oxide protects on contact — no 15-minute wait required.
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: This is the formula dermatologists point to first — talk to your OB before switching skincare, but zinc oxide is the standard recommendation.
- Rosacea or reactive skin: Patch test first, but zinc oxide's anti-inflammatory nature makes this one of the gentlest SPF options available.
- Deeper skin tones: Warm the product between fingertips before applying and blend in thin layers to minimize any cast.
- Layering: Since it works on contact, this is a good option 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, Pregnancy-Safe |
| Finish | Creamy, soft-focus, minimal cast |
| Regulatory Status | FDA-Registered OTC Drug · Broad Spectrum labeling confirmed |
| Country of Origin | Republic of Korea |
| Usage | Morning (AM) · Final skincare step · Works on contact · 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 U.S. FDA-registered OTC formula. Your skin deserves the real thing.