Sunscreen Reviewed Jul 4, 2026

Stream2Sea

A cosmetic chemist's aquatic-tested 19% non-nano zinc, EWG Verified and reef-focused.

Our take

Why We Trust This Brand

This is a best-in-class fit for both axes: a 19% non-nano zinc-only, fragrance-free formula with a rare triple of EWG Verified, Protect Land + Sea, and USDA Biobased certifications, made by a founder who is herself a cosmetic chemist. Ownership is fully independent, woman-owned and veteran-operated with no outside capital found. The only claim we could not confirm was a third-party 'Made SAFE' certification, so we do not list it.

What's inside

Ingredients & Safety

Every Day Active Mineral Sunscreen: zinc oxide 19%, non-nano ('EcoSafe' naturally-coated USP), the sole active with no titanium and no chemical filters. Fragrance-free, with green tea, tulsi, wakame and turmeric extracts as antioxidants. Aquatic-tested against its own 'Reef-Safer' standard.

Certifications

EWG Verified Protect Land + Sea (Reef Safe) USDA Certified Biobased (100%)

No listed ingredient is currently on our watch or caution list. This finding applies only to the ingredient list shown below and may not cover every product, variant, market, or reformulation.

Ingredient List Reviewed

Safe Watch Caution
  • Non-Nano Zinc Oxide 19%
  • Aqua also listed as Aqua, Purified Water
  • Camellia Sinensis (Green Tea) Leaf Extract
  • Ocimum Sanctum (Tulsi) Leaf Extract
  • Undaria Pinnatifida (Wakame) Extract
  • Curcuma Longa (Turmeric) Root Extract
  • Glycerin also listed as Glycerine, Vegetable Glycerin
  • Tocopherol also listed as Vitamin E

Formula scope: the disclosed ingredient list captured for this review. Formulas can differ by product, scent, country, and date; compare the current package with this list before deciding.

Who owns it

Ownership & Independence

Founded in 2015 by cosmetic chemist Autumn Blum and headquartered in Wauchula, FL with its own FDA-registered manufacturing facility. Described as woman-owned and veteran-operated; no funding rounds, private equity, or acquisitions were found.

Where to buy

Key Products

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