ROUND LAB Birch Moisturizing Sun Cushion SPF 50+, Pa++++
78/100 overall score
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About this sunscreen
ROUND LAB Birch Moisturizing Sun Cushion SPF 50+, Pa++++ is a pure mineral sunscreen cushion using Zinc Oxide and Titanium Dioxide. The cushion format keeps a balanced finish, and a low breakout-trigger rating makes it generally fine for oily skin, but as a mineral formula it can leave a high white cast and wears with a moderate weight. Makeup compatibility is okay. At 77.9/100 with good protection, it is a solid mineral reapply option for those who do not mind some cast.
Ingredient & SPF scores
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UV protection
Good
76
- +41 Zinc Oxide at #2, UV filter (UVA1 +18)
- +31.4 Titanium Dioxide at #5, UV filter (UVA1 +4.8)
- β0.4 UVA2 coverage saturated
- +4 Label claims (SPF 50, PA rating)
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White cast
High
15
- +100 Starting score
- β55 Zinc Oxide at #2
- β35 Titanium Dioxide at #5
- β10 Zinc Oxide + Titanium Dioxide together
- β15 Pure mineral formula
- +15 Penalties exceed the scale, floored at 0
- +15 Coated minerals (Triethoxycaprylylsilane, Aluminum Hydroxide)
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Heavy feel
Medium
44
- +100 Starting score
- β40 Zinc Oxide at #2
- β16 Titanium Dioxide at #5
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Fungal acne
Medium
75
- +100 Starting score
- β23 2 long-chain (C12+) esters that feed Malassezia (Polyglyceryl-4 Diisostearate/Polyhydroxystearate/Sebacate, Polyglyceryl-6 Polyricinoleate)
- β2 1 ubiquitous fatty ingredients (Stearic Acid), weak Malassezia signal
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Fabric stains
Low
80
- +100 Starting score
- β15 Zinc Oxide at #2, white marks, worst on dark fabric (washable)
- β5 Both minerals present, heavier deposit
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Moisture
Balanced
LightNourishing
- β 3 1 sebum-absorbing powders (Methyl Methacrylate Crosspolymer)
- β 5 Zinc Oxide at #2, mild sebum absorbent
- β 4 Glycerin at #10, the anchor humectant
- β 2 Sodium Hyaluronate at #20, hyaluronic family
- β 1 1 strong humectants (Glyceryl Glucoside)
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Finish
Balanced
MatteDewy
- β 3 1 sebum-absorbing powders (Methyl Methacrylate Crosspolymer)
- β 3 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 3 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 (40)
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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Emollient, softens and smooths skin
- matte β 3 dry-touch emollient, anti-shine
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Emollient, softens and smooths skin
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Mineral UV filter (Titanium Dioxide)
- β 31.4 UV protection, incl. long-UVA (UVA1)
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Humectant, pulls water into the skin
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Emollient, softens and smooths skin
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Emulsifier, keeps oil and water blended
- β 14 feeds malassezia
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Humectant, pulls water into the skin
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10 Glycerin
Humectant, pulls water into the skin
- 4 β nourishing the anchor humectant
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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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Emollient, softens and smooths skin
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Emulsifier, keeps oil and water blended
- 1 β nourishing humectant
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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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Soothing, skin-conditioning active
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Botanical extract
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Botanical extract
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Humectant, pulls water into the skin
- 2 β nourishing hyaluronic family
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Humectant, pulls water into the skin
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Soothing, skin-conditioning active
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23 Allantoin
Soothing, skin-conditioning active
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Botanical extract
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Botanical extract
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Antioxidant, protects the formula and skin
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Humectant, pulls water into the skin
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Thickener and texture, structures the gel or cream
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Thickener and texture, structures the gel or cream
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Supporting ingredient
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Thickener and texture, structures the gel or cream
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32 Stearic Acid
Emollient, softens and smooths skin
- β 2 minor malassezia feeder
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Supporting ingredient
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Emulsifier, keeps oil and water blended
- β 9 feeds malassezia
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Humectant, pulls water into the skin
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Emollient, softens and smooths skin
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Emulsifier, keeps oil and water blended
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Emollient, softens and smooths skin
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Preservative, keeps the formula from spoiling
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40 Tocopherol
Antioxidant, protects the formula and skin
Does ROUND LAB Birch Sun Cushion leave a white cast?
It can. Its ghost-mode rating is high, which is common for a mineral cushion, so expect some visible cast on application.
Is the ROUND LAB Birch Moisturizing Sun Cushion SPF 50+, Pa++++ mineral or chemical?
It is a pure mineral sunscreen, using Zinc Oxide and Titanium Dioxide with no chemical UV filters.
Is it good for oily skin?
Generally fine for acne-prone skin, given a low breakout-trigger rating and a balanced finish, though it wears with a moderate weight. It scores 77.9/100 with good protection.