Alastin Silkshield All-mineral Sunscreen SPF 30
73/100 overall score
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About this sunscreen
Alastin SilkShield is an SPF 30 all-mineral sunscreen using Zinc Oxide as its sole UV filter. It has a balanced finish and stays lightweight, with a medium white cast that is common for zinc formulas and may show on deeper tones. It is low pore-clogging, does not commonly sting, and is rated to layer well under makeup. Protection is moderate and it scores 72.9/100, a dependable mineral choice for everyday wear.
Ingredient & SPF scores
βοΈ
UV protection
Moderate
42
- +41 Zinc Oxide at #1, UV filter (UVA1 +18)
- +1 Label claims (SPF 30)
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White cast
Medium
43
- +100 Starting score
- β42 Zinc Oxide, 20.0% declared
- β15 Pure mineral formula (20% total declared)
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Heavy feel
Low
78
- +100 Starting score
- β30 Zinc Oxide, 20.0% declared
- +7.5 Volatile silicone at #3, flashes off
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Fungal acne
Safe
100
- +100 Starting score
- +0 Dimethicone at #2, a safe base that does not feed Malassezia
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Fabric stains
Low
85
- +100 Starting score
- β15 Zinc Oxide at #1, white marks, worst on dark fabric (washable)
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Moisture
Light
LightNourishing
- β 3 1 sebum-absorbing powders (Methyl Methacrylate Crosspolymer)
- β 8 Volatile carriers flash off, leaving a dry finish
- β 5 Zinc Oxide at #1, mild sebum absorbent
- β 1 1 strong humectants (Ectoin)
- β 4 1 emollient lipids (Squalane)
β¨
Finish
Balanced
MatteDewy
- β 3 1 sebum-absorbing powders (Methyl Methacrylate Crosspolymer)
- β 7 Volatile carriers flash off, leaving a dry finish
- β 6 1 emollient lipids (Squalane)
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Makeup base
Good
PillsPrimer
- β 12 Primer-style base, volatile silicones and dimethicone slip
- β 8 1 velvet elastomer fillers, blur and grip
- β 15 High mineral load at #1 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 βSkincare extras
Beneficial actives this formula contains. Informational only, not part of the rating: their effect depends on a concentration the label does not disclose.
- β¨ Vitamin E
Full ingredient list (19)
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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Mineral UV filter (Zinc Oxide), high in the list, a primary filter
- β 41 UV protection, incl. long-UVA (UVA1)
- β 42 20.0% declared
- β 30 20.0% declared
- 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
-
Volatile silicone, flashes off for a light finish
- light β 8 volatile carrier, flashes off
- matte β 7 volatile carrier, flashes off
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Emollient, softens and smooths skin
-
5 Squalane
Emollient, softens and smooths skin
- 4 β nourishing emollient lipid
- 6 β dewy emollient lipid
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Emulsifier, keeps oil and water blended
-
Film former, locks the formula onto skin for water resistance
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Mattifying powder, absorbs oil and blurs the finish
- light β 3 sebum-absorbing powder
- matte β 3 sebum-absorbing powder
-
Emollient, softens and smooths skin
-
Protein, peptide or amino acid, conditions and hydrates skin
-
Protein, peptide or amino acid, conditions and hydrates skin
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Botanical extract
-
13 Ectoin
Soothing, skin-conditioning active
- 1 β nourishing humectant
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Supporting ingredient
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15 Tocopherol
Antioxidant, protects the formula and skin
-
Emollient, softens and smooths skin
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Thickener and texture, structures the gel or cream
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Antioxidant, protects the formula and skin
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Supporting ingredient
Does Alastin SilkShield leave a white cast?
It has a medium white cast, which is typical of an all-mineral Zinc Oxide formula. It may show on deeper skin tones and can need some blending.
Does the Alastin Silkshield All-mineral Sunscreen SPF 30 work under makeup?
Yes, it is rated to layer well under makeup. The lightweight feel and low pore-clogging risk help it sit comfortably as a base.
Is the Alastin Silkshield All-mineral Sunscreen SPF 30 mineral or chemical?
It is an all-mineral sunscreen using Zinc Oxide as its only UV filter, with no chemical filters.