ROUND LAB Birch Juice Mild-up UV LOCK SPF 50+
- Sunscreen
- SPF 50
- 1.7 fl oz
- All
A fragrance-free, zinc oxide SPF 50+ built for sensitive and oily skin that wants broad-spectrum coverage without a chemical filter.
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How it ranks among the 132 sunscreens we track
4.3★ across 596 Amazon ratings, Bayesian-smoothed toward the category average.
596 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
50+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 132 sunscreens we track - how the scorecard works · full sunscreens data report. Confidence: high - strong rating volume and complete data.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
A mineral-only SPF 50+ sunscreen from Round LAB built around zinc oxide and birch sap, formulated for sensitive and oily skin that needs broad-spectrum coverage without added fragrance. The lightweight cream sits in Round LAB's Korean skincare line at 1.69 fl oz.
This sunscreen leans on a zinc oxide UV filter rather than a chemical one, which is the more common approach for reef-safe and sensitive-skin claims. Round LAB pairs it with birch sap for hydration and markets it as free of 19 commonly flagged ingredients, aimed at users managing oil control alongside sun protection. It comes in a 50ml/1.69 fl oz tube, sized for a single person's daily use rather than a bulk supply.
- SPF 50+ broad spectrum protection
- Zinc oxide mineral UV filter
- Birch sap for hydration
- Fragrance-free, non-comedogenic cream
Who it's for
Best suited to people with sensitive or oily, sebum-prone skin who prefer a mineral filter over a chemical one and want a fragrance-free daily sunscreen. Not aimed at anyone wanting a tinted formula or extra moisture for very dry skin, since the emphasis here is oil control.
Strengths and trade-offs
Drawn from this product's published specifications.
- Mineral zinc oxide filter for sensitive skin
- Fragrance-free with oil control for sebum-prone skin
- Broad spectrum SPF 50+ coverage
- Small 1.69 fl oz tube for daily use
- No tint or added moisture for dry skin
Performance notes
Zinc oxide sits on top of the skin to physically block and scatter UV rays rather than absorbing them, which is why it is generally favored for reactive or sensitive skin. The water-resistant cream is built for daily wear under makeup rather than swimming or heavy sweating.
Specifications
| Brand | Round LAB |
|---|---|
| Model | RU02G0019 |
| Dimensions & fit | |
| Item Weight | 1.8 ounces |
| Item Dimensions | 5 × 1 × 1 inches |
| Package Size Name | 50ml |
| Capacity & performance | |
| Item Volume | 1.7 fl oz |
| Age Range Description | Adult |
| Included components | |
| Unit Count | 1.7 fl oz |
| Other details | |
| Sun Protection Factor | SPF 50 |
| Skin Type | All |
| Number Of Items | 1 |
| Skin Tone | All |
| Manufacturer | KOLMAR KOREA |
| Scent Name | Unscented |
| Additional Features | Infused with Birch Sap for Deep Hydration, Free of 19 Harsh Ingredients, Clinically Tested for Safety, Mineral-Based UV Filter, Fragrance-Free |
| Asin | B0DK4MXPMD |
| Best Sellers Rank | #12,221 in Beauty & Personal Care (See Top 100 in Beauty & Personal Care) #141 in Facial Sunscreens #1,588 in Facial Skin Care Products |
| Recommended Uses For Product | daily wear, outdoor activities, beach/pool use, hiking/camping, sensitive skin |
| Customer Reviews | {'ratings_count': '596', 'stars': '4.3'} |
| Manufacturer Part Number | RU02G0019 |
| Product Benefits | SPF 50+ broad spectrum UVA/UVB protection, reef safe, controls oil and sebum, suitable for sensitive skin, non-comedogenic, and easy to apply. |
| Item Form | Cream |
| Active Ingredients | hyaluronic_acid |
| Water Resistance Level | Water Resistant |
Other Round LAB sunscreens
How it compares
This product against the closest alternatives we track in sunscreens.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| ROUND LAB Birch Juice Mild-up UV LOCK SPF 50+This product | 4.3 / 5 | 596 | 3.9 / 5 |
| mixsoon Centella Hyal Sunscreen 50mlmixsoon | 4.6 / 5 | 3,000 | 4.5 / 5 |
| Sun Bum SPF 50 Face Cream Sunscreen with Zinc OxideSun Bum | 4.7 / 5 | 7,900 | 4.3 / 5 |
| Eucerin Sun Age Defense SPF 50 Face Sunscreen Lotion with Hyaluronic AcidEucerin | 4.7 / 5 | 4,600 | 4.3 / 5 |
| IMAGE Skincare PREVENTION+ Daily Ultimate Protection MoisturizerIMAGE Skincare | 4.6 / 5 | 3,200 | 4.2 / 5 |
Similar sunscreens from other brands
Questions about the Round LAB RU02G0019
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Is Round LAB's Birch Juice sunscreen a chemical or mineral formula?
It uses zinc oxide as its UV filter, making it a mineral (physical) sunscreen rather than a chemical one.
Will this sunscreen control oil on combination or oily skin?
Round LAB markets it specifically for oil and sebum control alongside sun protection, and it is fragrance-free and non-comedogenic.
How much product comes in one tube?
The tube holds 1.69 fl oz (50ml), sized as a daily-use single bottle rather than a bulk size.