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kier� Prime Sun Gel
kier�

Prime Sun Gel

SPF 41 · PA++++
Our score 82.5 / 100

Fragrance and octocrylene add tolerance concerns. Isododecane, volatile silicones and elastomers strongly support lightweight gel spreading; wear is untested and no specific health harm is established

Invisible No white cast — chemical/hybrid filters that straight-up disappear on skin. South Korea
03 The facts, at a glance
Protection
Filter type Mineral filters (zinc oxide, titanium dioxide) sit on skin and reflect UV. Chemical filters absorb UV. Hybrid runs both.
Chemical
Broad spectrum Covers both UVA and UVB. UVA drives aging and deeper damage; UVB gives you burns.
Yes
Formulation & feel
Texture How it feels going on — milk, gel, cream, spray, stick, essence, lotion, powder, or cushion.
Gel
Finish How it looks once dry: matte, natural, dewy, or glowy.
Natural
Tinted Adds sheer pigment (iron oxides) that masks the white cast common to mineral filters and gives a skin-tone finish.
No
fragrance-free No synthetic perfume added. Not FDA-defined in the US; the EU requires 'Parfum' + the 26 named allergens on the label. 'Unscented' is different — it can hide masking fragrance. Botanical oils still scent.
No
Alcohol-free No drying short-chain alcohols (alcohol denat., SD alcohol, ethanol). Doesn't mean fatty alcohols like cetyl or stearyl — those are emollients.
Yes
Where to buy it
YesStyle US In stock
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82.5
Composite score · independent
Ranks #1178 of 1759 in the current catalogue. Fragrance and octocrylene add tolerance concerns. Isododecane, volatile silicones and elastomers strongly support lightweight gel spreading; wear is untested and no specific health harm is established
Composite is a weighted blend: UV 25% · Modernity 10% · Sensitivity 15% · Environment 10% · Elegance 15% · Health 25%. That's the recipe.
The score breakdown
UV protection How hard it blocks UVA + UVB across the spectrum at the stated SPF/PA. 88
Filter modernity Dings legacy filters (octinoxate, oxybenzone); rewards photostable next-gen ones. 50
Sensitivity safety Risk for reactive skin — fragrance, alcohol, and known sensitisers. 73
Reef / env. safety Reef toxicity plus how biodegradable the UV filters and surfactants are. 85
Cosmetic elegance Spread, finish, white-cast, and how it actually feels on skin. 90
Health safety Endocrine concerns and systemic absorption signals across the whole formula. 90
02 Composition · key UV filters 4 filters resolved
UVA-I 340–400nm UVA-I (340–400nm) — covered UVA-II 320–340nm UVA-II (320–340nm) — covered UVB 290–320nm UVB (290–320nm) — covered
Homosalate Legacy Older organic filter. Photostable in combination; some literature concerns.
Octocrylene Legacy Older organic filter. Photostable in combination; some literature concerns.
Octisalate Legacy Older organic filter. Photostable in combination; some literature concerns.
Avobenzone Legacy Older organic filter. Photostable in combination; some literature concerns.
04 Full ingredient list (INCI) 32 ingredients
MODERN FILTER 0 LEGACY FILTER 5 MINERAL FILTER 0 ADDED FRAGRANCE 1 NATURAL FRAGRANCE 0 ALCOHOL 0 WATCH 0 ACTIVE 4
Isododecane·Cyclopentasiloxane· Homosalate Homosalate — legacy UVB filter; endocrine literature. · Octocrylene Octocrylene — degrades to benzophenone over time. ·Cyclohexasiloxane·Dimethicone/Bis-isobutyl PPG-20 Crosspolymer·Vinyl Dimethicone/Methicone Silsesquioxane Crosspolymer· Ethylhexyl Salicylate Octisalate — older filter; well-tolerated. · Butyloctyl Salicylate Salicylate-class booster; supports avobenzone. · Butyl Methoxydibenzoylmethane Avobenzone — UVA filter, needs stabilisation. ·1,2-Hexanediol·Helianthus Annuus Seed Oil·Polyglyceryl-4 Oleate·Water·C12-13 Pareth-9·Polyglyceryl-6 Oleate·Polyhydroxystearic Acid· Ethylhexylglycerin Humectant — the workhorse hydrator. ·Glycine Soja Oil·Caryodendron Orinocense Seed Oil· Tocopherol Vitamin E — antioxidant. ·Plukenetia Volubilis Seed Oil·Bixa Orellana Seed Oil·Sodium Guaiazulene Sulfonate· Panthenol Vitamin B5 — soothing humectant. ·Butylene Glycol·Anthemis Nobilis Flower Water· Madecassoside Centella — calming, repair. ·Asiaticoside·Asiatic Acid·Madecassic Acid· Fragrance Synthetic fragrance blend — a common irritant. Composition is a trade secret; can include dozens of compounds. Avoid if your skin is reactive.
Source: brand-published INCI. Last verified 2026. Show in detail
01 Isododecane Isododecane
02 Cyclopentasiloxane Cyclopentasiloxane
03 Homosalate LEGACY FILTER Homosalate — legacy UVB filter; endocrine literature.
04 Octocrylene LEGACY FILTER Octocrylene — degrades to benzophenone over time.
05 Cyclohexasiloxane Cyclohexasiloxane
06 Dimethicone/Bis-isobutyl PPG-20 Crosspolymer Dimethicone/Bis-Isobutyl PPG-20 Crosspolymer
07 Vinyl Dimethicone/Methicone Silsesquioxane Crosspolymer Vinyl Dimethicone/Methicone Silsesquioxane Crosspolymer
08 Ethylhexyl Salicylate LEGACY FILTER Octisalate — older filter; well-tolerated.
09 Butyloctyl Salicylate LEGACY FILTER Salicylate-class booster; supports avobenzone.
10 Butyl Methoxydibenzoylmethane LEGACY FILTER Avobenzone — UVA filter, needs stabilisation.
11 1,2-Hexanediol 1,2-Hexanediol
12 Helianthus Annuus Seed Oil Sunflower Seed Oil
13 Polyglyceryl-4 Oleate
14 Water Water
15 C12-13 Pareth-9
16 Polyglyceryl-6 Oleate
17 Polyhydroxystearic Acid Polyhydroxystearic Acid
18 Ethylhexylglycerin ACTIVE Humectant — the workhorse hydrator.
19 Glycine Soja Oil Soybean Oil
20 Caryodendron Orinocense Seed Oil
21 Tocopherol ACTIVE Vitamin E — antioxidant.
22 Plukenetia Volubilis Seed Oil
23 Bixa Orellana Seed Oil
24 Sodium Guaiazulene Sulfonate
25 Panthenol ACTIVE Vitamin B5 — soothing humectant.
26 Butylene Glycol Butylene Glycol
27 Anthemis Nobilis Flower Water
28 Madecassoside ACTIVE Centella — calming, repair.
29 Asiaticoside Asiaticoside
30 Asiatic Acid Asiatic Acid
31 Madecassic Acid Madecassic Acid
32 Fragrance ADDED FRAGRANCE Synthetic fragrance blend — a common irritant. Composition is a trade secret; can include dozens of compounds. Avoid if your skin is reactive.