Description
ROUND LAB Birch Moisturizing Sunscreen is a hydrating Korean sunscreen loved for its comfortable, dewy everyday wear.
Daily hydration with broad-spectrum SPF 45
ROUND LAB Birch Moisturizing Sunscreen UVLock combines daily sun protection with a lightweight, moisturizing finish. The formula features birch sap and hyaluronic acid and absorbs comfortably for everyday wear, including under makeup.
- Broad Spectrum SPF 45
- Lightweight texture with a dewy finish
- Moisturizing care with birch sap and hyaluronic acid
- Full size: 50 ml / 1.69 fl. oz.
How to use
- Apply liberally and evenly 15 minutes before sun exposure.
- Reapply at least every 2 hours.
- Use a water-resistant sunscreen when swimming or sweating.
For children under 6 months of age, ask a doctor. Use protective clothing, a hat and sunglasses, and limit time in the sun, especially between 10 a.m. and 2 p.m.
Product details
This listing is for the UVLock Broad Spectrum SPF 45 version shown in the photos. Size: 50 ml.
Precautions
For external use only. Do not use on damaged or broken skin. Keep out of eyes; rinse with water if contact occurs. Stop use and ask a doctor if a rash develops. Keep out of reach of children.
Why choose ROUND LAB Birch Moisturizing Sunscreen?

ROUND LAB is one of Korea’s best-known skincare brands for simple, moisturizing formulas. ROUND LAB Birch Moisturizing Sunscreen uses birch sap from Inje, Korea together with hyaluronic acid, so it feels like a light moisturizer while delivering broad-spectrum SPF 45. It absorbs without a heavy white cast and works well under makeup.
Who it suits best
- Dry or dehydrated skin that feels tight under ordinary sunscreen
- Indoor and office days when you still want daily UV care
- People who like a dewy, healthy-looking finish
- Anyone building a simple morning K-beauty routine
Tips for the best results
Apply generously 15 minutes before going outside and reapply at least every two hours outdoors. For more on choosing sunscreen, see the U.S. FDA sunscreen guide.
Discover more Korean sunscreens and moisturizing skincare in our K Cultures shop.
Formula and label
This listing supplies the UVLock Broad Spectrum SPF 45 formula in a 50 ml tube. The brand lists avobenzone, homosalate and octisalate as the sunscreen active ingredients. Refer to the Drug Facts and full ingredient list on the supplied package for the exact concentrations, directions and warnings.







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