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ROUND LAB Birch Juice Moisturizing UVLock Sun Stick
ROUND LAB

Birch Juice Moisturizing UVLock Sun Stick

SPF 50+ · PA++++
Our score 82.6 / 100

Pine and chamomile oils plus octocrylene add allergy concerns. Silicones and texture powders may balance the wax-rich stick; actual film feel is uncertain, with no established dose-specific health har

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.
Stick
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.
Yes
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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82.6
Composite score · independent
Ranks #1158 of 1759 in the current catalogue. Pine and chamomile oils plus octocrylene add allergy concerns. Silicones and texture powders may balance the wax-rich stick; actual film feel is uncertain, with no established dose-specific health har
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. 100
Filter modernity Dings legacy filters (octinoxate, oxybenzone); rewards photostable next-gen ones. 50
Sensitivity safety Risk for reactive skin — fragrance, alcohol, and known sensitisers. 65
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. 79
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) 46 ingredients
MODERN FILTER 0 LEGACY FILTER 5 MINERAL FILTER 0 ADDED FRAGRANCE 0 NATURAL FRAGRANCE 0 ALCOHOL 0 WATCH 0 ACTIVE 4
Water· Homosalate Homosalate — legacy UVB filter; endocrine literature. · Octocrylene Octocrylene — degrades to benzophenone over time. · Ethylhexyl Salicylate Octisalate — older filter; well-tolerated. · Butyl Methoxydibenzoylmethane Avobenzone — UVA filter, needs stabilisation. ·Diethylhexyl Carbonate·Dimethicone·Methyl Methacrylate Crosspolymer·Synthetic Wax·Diphenylsiloxy Phenyl Trimethicone· Butyloctyl Salicylate Salicylate-class booster; supports avobenzone. ·Isopropyl Palmitate·Phenethyl Benzoate·Diisostearyl Malate·Ethylhexyl Isononanoate·Caprylyl Trimethicone·Synthetic Fluorphlogopite·Bis-behenyl/Isostearyl/Phytosteryl Dimer Dilinoleyl Dimer Dilinoleate·Polymethylsilsesquioxane·Polyethylene·Dimethicone/Vinyl Dimethicone Crosspolymer·Camellia Japonica Seed Oil·Ethylene/Propylene Copolymer·Silica Dimethyl Silylate·Dimethicone Crosspolymer·Candelilla Wax Esters·Artemisia Annua Extract·Copernicia Cerifera Wax·Pinus Sylvestris Leaf Oil·Anthemis Nobilis Flower Oil·Dipotassium Glycyrrhizate· Allantoin Soothing; barrier-supportive. ·Glyceryl Glucoside·Butylene Glycol· Glycerin Humectant — the workhorse hydrator. ·1,2-Hexanediol·Betula Platyphylla Japonica Juice·Ulmus Davidiana Root Extract·Aloe Barbadensis Leaf Extract·Dioscorea Japonica Root Extract·Viola Mandshurica Flower Extract·Laminaria Japonica Extract·Glyceryl Caprylate· Sodium Hyaluronate Hyaluronic acid — humectant. · Hyaluronic Acid Hyaluronic acid — humectant. ·Ascorbic Acid
Source: brand-published INCI. Last verified 2026. Show in detail
01 Water Water
02 Homosalate LEGACY FILTER Homosalate — legacy UVB filter; endocrine literature.
03 Octocrylene LEGACY FILTER Octocrylene — degrades to benzophenone over time.
04 Ethylhexyl Salicylate LEGACY FILTER Octisalate — older filter; well-tolerated.
05 Butyl Methoxydibenzoylmethane LEGACY FILTER Avobenzone — UVA filter, needs stabilisation.
06 Diethylhexyl Carbonate Diethylhexyl Carbonate
07 Dimethicone Dimethicone
08 Methyl Methacrylate Crosspolymer Methyl Methacrylate Crosspolymer
09 Synthetic Wax
10 Diphenylsiloxy Phenyl Trimethicone Diphenylsiloxy Phenyl Trimethicone
11 Butyloctyl Salicylate LEGACY FILTER Salicylate-class booster; supports avobenzone.
12 Isopropyl Palmitate Isopropyl Palmitate
13 Phenethyl Benzoate Phenethyl Benzoate
14 Diisostearyl Malate Diisostearyl Malate
15 Ethylhexyl Isononanoate Ethylhexyl Isononanoate
16 Caprylyl Trimethicone Caprylyl Trimethicone
17 Synthetic Fluorphlogopite
18 Bis-behenyl/Isostearyl/Phytosteryl Dimer Dilinoleyl Dimer Dilinoleate Bis-Behenyl/Isostearyl/Phytosteryl Dimer Dilinoleyl Dimer Dilinoleate
19 Polymethylsilsesquioxane Polymethylsilsesquioxane
20 Polyethylene Polyethylene
21 Dimethicone/Vinyl Dimethicone Crosspolymer Dimethicone/Vinyl Dimethicone Crosspolymer
22 Camellia Japonica Seed Oil Camellia Seed Oil
23 Ethylene/Propylene Copolymer Ethylene/Propylene Copolymer
24 Silica Dimethyl Silylate Silica Dimethyl Silylate
25 Dimethicone Crosspolymer Dimethicone Crosspolymer
26 Candelilla Wax Esters Candelilla Wax Esters
27 Artemisia Annua Extract Sweet Wormwood Extract
28 Copernicia Cerifera Wax Carnauba Wax
29 Pinus Sylvestris Leaf Oil Scotch Pine Leaf Oil
30 Anthemis Nobilis Flower Oil Roman Chamomile Oil
31 Dipotassium Glycyrrhizate Dipotassium Glycyrrhizate
32 Allantoin ACTIVE Soothing; barrier-supportive.
33 Glyceryl Glucoside Glyceryl Glucoside
34 Butylene Glycol Butylene Glycol
35 Glycerin ACTIVE Humectant — the workhorse hydrator.
36 1,2-Hexanediol 1,2-Hexanediol
37 Betula Platyphylla Japonica Juice Japanese White Birch Juice
38 Ulmus Davidiana Root Extract Korean Elm Root Extract
39 Aloe Barbadensis Leaf Extract Aloe Vera Leaf Extract
40 Dioscorea Japonica Root Extract Japanese Yam (Dioscorea Japonica) Root Extract
41 Viola Mandshurica Flower Extract Manchurian Violet Flower Extract
42 Laminaria Japonica Extract Kombu Extract
43 Glyceryl Caprylate Glyceryl Caprylate
44 Sodium Hyaluronate ACTIVE Hyaluronic acid — humectant.
45 Hyaluronic Acid ACTIVE Hyaluronic acid — humectant.
46 Ascorbic Acid Ascorbic Acid (Vitamin C)