ROUND LAB Birch Mild-up Sunscreen Uvlock SPF 50+ Broad Spectrum
71/100 overall score
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Ingredient & SPF scores
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UV protection
Moderate
43
- +41 Zinc Oxide at #2, UV filter (UVA1 +18)
- +2 Label claims (SPF 50)
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Allergens
Low
98
- +100 Starting score
- β2 Essential oils (Anthemis Nobilis Flower Oil)
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White cast
Medium
35
- +100 Starting score
- β55 Zinc Oxide at #2
- β15 Pure mineral formula
- +4.9 Coated minerals (Triethoxycaprylylsilane)
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Heavy feel
Low
66
- +100 Starting score
- β40 Zinc Oxide at #2
- +6 Volatile hydrocarbon at #3, flashes off
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Fungal acne
Safe
100
- +100 Starting score
- +0 Saccharomyces Ferment Extract at #21, ferment, disputed Malassezia trigger (not penalized)
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Fabric stains
Low
85
- +100 Starting score
- β15 Zinc Oxide at #2, white marks, worst on dark fabric (washable)
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Moisture
Light
LightNourishing
- β 4.5 2 sebum-absorbing powders (Polymethylsilsesquioxane, Methyl Methacrylate Crosspolymer)
- β 8 Volatile carriers flash off, leaving a dry finish
- β 5 Zinc Oxide at #2, mild sebum absorbent
- β 1 Glycerin at #13, the anchor humectant
- β 4 Sodium Hyaluronate at #8, hyaluronic family
- β 1 1 strong humectants (Glyceryl Glucoside)
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Finish
Matte
MatteDewy
- β 4 2 sebum-absorbing powders (Methyl Methacrylate Crosspolymer, Polymethylsilsesquioxane)
- β 8 Volatile carriers flash off, leaving a dry finish
- β 2 1 dry-touch emollients reduce greasy shine (Caprylyl Methicone)
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Makeup base
Okay
PillsPrimer
- β 5 Primer-style base, volatile silicones and dimethicone slip
- β 4 Quick-setting carrier, fast, even canvas
- β 2 Dry-touch esters, smooth fast-absorbing base
- β 15 High mineral load at #2 greys under foundation
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Water resistance
Not resistant
Non-water-resistantWater-resistant
Nothing flagged in the ingredient list.
How we rate water resistance βFull ingredient list (32)
What each ingredient does and how it moves each rating: green helps, red hurts, β / β give the direction, and β / β shift a slider toward its ends (finish, moisture, makeup base). Auto-derived from our scoring rules and the ingredient's position.
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1 Water
Solvent base, the water phase
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Mineral UV filter (Zinc Oxide), high in the list, a primary filter
- β 41 UV protection, incl. long-UVA (UVA1)
- β 15 white marks, worst on dark fabric (washable)
- light β 5 mild sebum absorbent
- pills β 15 High mineral load greys under foundation
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Volatile hydrocarbon, flashes off for a light finish
- light β 7 volatile carrier, flashes off
- matte β 7 volatile carrier, flashes off
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Emollient, softens and smooths skin
- matte β 2 dry-touch emollient, anti-shine
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Emulsifier, keeps oil and water blended
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Emollient, softens and smooths skin
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Thickener and texture, structures the gel or cream
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Humectant, pulls water into the skin
- 4 β nourishing hyaluronic family
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Humectant, pulls water into the skin
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Botanical extract
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Botanical extract
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Mattifying powder, absorbs oil and blurs the finish
- light β 3 sebum-absorbing powder
- matte β 3 sebum-absorbing powder
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13 Glycerin
Humectant, pulls water into the skin
- 1 β nourishing the anchor humectant
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Humectant, pulls water into the skin
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15 Propanediol
Humectant, pulls water into the skin
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Emulsifier, keeps oil and water blended
- 1 β nourishing humectant
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Thickener and texture, structures the gel or cream
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Supporting ingredient
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Botanical extract
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Botanical extract
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Botanical extract
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Humectant, pulls water into the skin
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Preservative, keeps the formula from spoiling
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Emollient, softens and smooths skin
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Emollient, softens and smooths skin
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Mattifying powder, absorbs oil and blurs the finish
- light β 1.5 sebum-absorbing powder
- matte β 1 sebum-absorbing powder
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Volatile silicone, flashes off for a light finish
- light β 1 volatile carrier, flashes off
- matte β 1 volatile carrier, flashes off
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Humectant, pulls water into the skin
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Emulsifier, keeps oil and water blended
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Botanical extract
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31 Tocopherol
Antioxidant, protects the formula and skin
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Antioxidant, protects the formula and skin