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An unlabeled pale yellow tube on a sunny windowsill beside sunglasses and a straw hat, generated illustration
Hydrating SPF · #25 skin Generated scene, not a product photo
Round Lab · Skin · Sunscreen

Round Lab Birch Moisturizing Sunscreen UVLock SPF 50 Broad Spectrum

A moisturizing sunscreen with birch sap and niacinamide, labeled by the maker as Broad Spectrum SPF 50. It uses US chemical filters, and its list includes chamomile and pine oils.

50 mlCreamAvobenzoneHomosalateOctisalateFragrance-free
$24.99 MSRPAmazon price not shown
Check price on Amazon →

Amazon link · we earn a commission if you buy · $24.99 MSRP · Amazon price not shown · verified Nov 1, 2026. More stores appear here as each affiliate program approves the site.

Buy it if

  • Your skin is dry or normal and you want a moisturizing sunscreen
  • You want no white cast, as the maker promises
  • You wear it under makeup

Walk past if

  • You are oily; one owner calls it a grease bomb
  • Essential oils bother you; chamomile and pine oils are on the list
  • You buy online; Walmart owners report suspected fakes

What's in it

The ingredients that do the work, from the maker’s label.

AvobenzoneHomosalateOctisalateBirch sapcontains essential oils

Sulfate-free →Fragrance-free →

Worth knowing: contains essential oils.

Full ingredient list, from the maker

Active ingredients: Avobenzone, Homosalate, Octisalate. Full ingredients: WATER, ACRYLATES COPOLYMER, CAPRYLYL METHICONE, SPARASSIS CRISPA EXTRACT, TOCOPHEROL (VITAMIN E), NIACINAMIDE, POLYGLYCERYL-3 DISTEARATE, AVOBENZONE, HOMOSALATE, CALCIUM ALUMINUM BOROSILICATE, 1,2-HEXANEDIOL, OCTISALATE, BUTYLOCTYL SALICYLATE, POLY C10-30 ALKYL ACRYLATE, CETEARYL ALCOHOL, TROMETHAMINE, GLYCERYL STEARATE CITRATE, BETULA PLATYPHYLLA JAPONICA JUICE, ARTEMISIA ANNUA EXTRACT, ANTHEMIS NOBILIS FLOWER OIL, ACRYLATES/C10-30 ALKYL ACRYLATE CROSSPOLYMER, GLYCERIN, BUTYLENE GLYCOL, SODIUM HYALURONATE, CARBOMER, ETHYLHEXYLGLYCERIN, HYALURONIC ACID, GLYCERYL GLUCOSIDE, PROPANEDIOL, PINUS SYLVESTRIS LEAF OIL, ALLANTOIN, PORTULACA OLERACEA EXTRACT, SODIUM STEAROYL GLUTAMATE, GLYCERYL POLYMETHACRYLATE, TRIETHOXYCAPRYLYLSILANE, PENTYLENE GLYCOL, METHYLPROPANEDIOL, BIOSACCHARIDE GUM-1, BENZOTRIAZOLYL DODECYL P-CRESOL, DIETHYLHEXYL 2,6-NAPHTHALATE, POLYMETHYLSILSESQUIOXANE

Known issue

Some owners report dryness, peeling or a rash after weeks of use, and one calls it a grease bomb; others report burning eyes.Ulta and Walmart reviews

What owners say

Filled by the research pass: two or three owner reports from named venues, each linked, each with the date it was read.

If it's not right

EltaMD UV Clear Broad Spectrum SPF 46$46 MSRPZinc oxide, octinoxate and 5% niacinamide, by the maker's figure, in a thin lotion labeled by the maker as broad spectrum SPF 46. A long-time favorite that still breaks some owners out.CeraVe Moisturizing CreamNo maker list price for this sizeThree ceramides, cholesterol, hyaluronic acid and petrolatum in a thick cream for face and body. The plain standard for dry skin, developed with dermatologists according to the maker.

Sources

  1. Maker's US page: active and full ingredient lists, 50 ml list price, broad spectrum SPF 50 wording.
  2. Ulta reviews, about 620, listed there as SPF 45: a 4.6 overall, with low ratings citing dryness, peeling, a spreading rash and a greasy feel.
  3. Walmart reviews, 17 written, listed as SPF 45: one owner reports burning eyes, and two suspect counterfeits from marketplace sellers.

Ingredient lists from the maker's label, not our measurements.