ROUND LAB
Birch Juice Moisturizing UVLOCK Sun Stick SPF 50
SPF 50+ Invisible No white cast — chemical/hybrid filters that straight-up disappear on skin. United States us-fda Formulation variant: us-fda. Region-specific reformulations are tracked as separate products.
US chemical stick (homosalate-led + octocrylene/avobenzone/octisalate); EDC-flagged filter stack and essential oils reduce health/sensitivity scores.
◐ CHEM Chemical filters Chemical filters — Organic filters absorb UV. Cosmetically elegant, but filter choice matters. ((· BS Broad spectrum Broad spectrum — Blocks UVA + UVB — covers the whole sun-damage spectrum. F F-FREE Fragrance-free Fragrance-free — No added fragrance — lower irritation risk if your skin's reactive. A A-FREE Alcohol-free Alcohol-free — No drying short-chain alcohols (denatured / SD alcohol).
Where to buy it
Ulta US In stock 広告 / Affiliate Disclosure · Sunscreen Ranker earns commission on the above links. Rankings are scored independently — no brand pays for placement.
66.3
Composite
Composite score · independent
Ranks #1078 of 1558 in the current catalogue. US chemical stick (homosalate-led + octocrylene/avobenzone/octisalate); EDC-flagged filter stack and essential oils reduce health/sensitivity scores.
01 The score breakdown
02 Composition · key UV filters 4 filters resolved
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
Verdict Is it worth it?
US chemical stick anchored by homosalate with octocrylene, octisalate, and avobenzone in a wax base. The filter set is dated relative to global Round Lab sticks, and homosalate plus several essential oils pull the sensitivity and health scores down.
Pros
- Wax-rich stick sits well over light makeup
- Pocket-size format for travel and on-the-go touch-ups
- Photostable avobenzone supported by octocrylene
Cons
- Homosalate and octocrylene are flagged for endocrine concerns
- Pine, chamomile, and bergamot-adjacent oils raise sensitivity risk
- Avobenzone alone handles UVA; no DHHB, BEMT, or Tinosorb
- Stick coverage is easy to underdose without multiple passes
Who it's for: US buyers committed to a Round Lab stick under FDA filter limits, with no essential-oil reactivity and willingness to apply firmly.
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
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·Water·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
17 Bis-behenyl/Isostearyl/Phytosteryl Dimer Dilinoleyl Dimer Dilinoleate Bis-Behenyl/Isostearyl/Phytosteryl Dimer Dilinoleyl Dimer Dilinoleate