The Seaweed Bath Co. Invisible Mineral SPF 50

The Seaweed Bath Co. Invisible Mineral SPF 50

SPF 50Efficacy90/100IrritancyMedium·2 UV filters

Works for

Sun protection
SPF 50 · 2 UV filters
Broad spectrum
SPF 50Broad spectrumMineral + chemical filters

This product offers a good level of protection against both UVB and UVA rays.

This sunscreen uses organic (so-called "chemical") sunscreen filters. Organic, or "chemical" filters usually provide reliable sun protection and rarely leave a white cast. Sunscreens with organic filters can sting eyes.

This product can be considered "reef safe" because it does not contain the UV filters (oxybenzone and octinoxate) that can be harmful to coral reefs when present in the water in high concentrations.

UV spectrum
UVB290–320 nmUVA II320–340 nmUVA I340–400 nm
Butyloctyl Salicylate
Zinc Oxide
FilterCoverageWhat it doesEst. amount
Butyloctyl SalicylateUVBA synthetic ester of salicylic acid that is used to help disperse pigments and boost effectiveness of sunscreen ingredients. It is able to absorb UV light (working as an organic, or chemical filter), but is not approved as a sunscreen ingredient on its own~4.1–6.2%
Zinc Oxide Mineral UVBUVA Photo-stable A broad spectrum sunblock (protects from both UVA and UVB rays). Is suitable for most sensitive skins. In small concentrations, can be used as a colorant10%
~ marks concentrations estimated from label position and typical use levels
Reef-safe
No oxybenzone or octinoxate — the two filters banned in Hawaii, Florida Keys and Aruba.
Anti-aging
Side benefit · Camellia sinensis leaf extract, Tocopherol + 1 more
Works well

This product can help prevent early signs of skin aging because it offers a good level of broad spectrum sun protection. Sun damage is the main cause of premature skin aging, and protecting your skin from the sun is the best anti-aging strategy.

Camellia sinensis leaf extractEffect: Low, below effective doseCan contain potent anti-oxidant compounds (abbreviated ECG, GCG, EGC, and EGCG) that might help protect the skin from free radicals. Can help calm down inflammation and has some anti-bacterial properties. Unfortunately, these antioxidants are unstable and lose their effectiveness very quickly in products. The concentration of the antioxidant compounds in the extract also tends to be low to be effective in topical formulation~0.15–0.55%
TocopherolEffect: Low, below effective dosePure form of vitamin E. Can help moisturise and protect the skin from free radicals. Often used to help stabilise other ingredients or the formula itself~0.1–0.3%
GluconolactoneUnder-dosedA polyhydroxy acid (PHA) that helps shed the dead cells from the skin surface revealing smoother skin. Is believed to be genter than AHAs. It helps attract water to the upper layer of the skin and can stimulate production of skin's own hyaluronic acid resulting in improved hydration levels. It has been shown to be helpful against acne and clogged pores if used consistently (e.g over a period of 12 weeks) in high enough concentration. It can help reduce fine lines and wrinkles and improve skin tone with long-term application. Can help neutralize free radicals~0.1–0.3%
Evens skin tone
Side benefit · Camellia sinensis leaf extract, Gluconolactone
Works well

This product offers broad spectrum sun protection. It means that it can prevent hyperpigmentation and help keep the skin tone even (sun damage is the main factor causing age spots, darkening of post-acne marks and other discolorations).

Camellia sinensis leaf extractEffect: Low, below effective doseCan contain potent anti-oxidant compounds (abbreviated ECG, GCG, EGC, and EGCG) that might help protect the skin from free radicals. Can help calm down inflammation and has some anti-bacterial properties. Unfortunately, these antioxidants are unstable and lose their effectiveness very quickly in products. The concentration of the antioxidant compounds in the extract also tends to be low to be effective in topical formulation~0.15–0.55%
GluconolactoneUnder-dosedA polyhydroxy acid (PHA) that helps shed the dead cells from the skin surface revealing smoother skin. Is believed to be genter than AHAs. It helps attract water to the upper layer of the skin and can stimulate production of skin's own hyaluronic acid resulting in improved hydration levels. It has been shown to be helpful against acne and clogged pores if used consistently (e.g over a period of 12 weeks) in high enough concentration. It can help reduce fine lines and wrinkles and improve skin tone with long-term application. Can help neutralize free radicals~0.1–0.3%
Moisturizing
Side benefit · Polymethylsilsesquioxane, Squalane + 4 more
Works

This product can help soften the skin and reduce its moisture loss with emollients and occlusives: squalane.

Keep in mind that this product does not contain effective ingredients to attract water to the upper layer of the skin. This is why an additional product with humectants like glycerin or hyaluronic acid can be helpful (apply it before this product for the best results).

PolymethylsilsesquioxaneKey activeEffect: HighA silicone that improves product texture and helps dissolve other ingredients. Can form a non-greasy film on the skin to prevent moisture loss~1.8–2.7%
SqualaneKey active· Emollient, OcclusiveEffect: HighAn oil naturally present in skin. Works as an emollient to soften the skin and form a protective layer on its surface without a greasy feeling.~1.2–1.8%
Chondrus crispusKey activeEffect: HighRed algae extract that helps attract water to the upper layer of the skin and create a nicer product consistency~0.2–0.8%
Camellia sinensis leaf extractEffect: Low, below effective doseCan contain potent anti-oxidant compounds (abbreviated ECG, GCG, EGC, and EGCG) that might help protect the skin from free radicals. Can help calm down inflammation and has some anti-bacterial properties. Unfortunately, these antioxidants are unstable and lose their effectiveness very quickly in products. The concentration of the antioxidant compounds in the extract also tends to be low to be effective in topical formulation~0.15–0.55%
TocopherolEffect: Low, below effective dosePure form of vitamin E. Can help moisturise and protect the skin from free radicals. Often used to help stabilise other ingredients or the formula itself~0.1–0.3%
GluconolactoneUnder-dosedA polyhydroxy acid (PHA) that helps shed the dead cells from the skin surface revealing smoother skin. Is believed to be genter than AHAs. It helps attract water to the upper layer of the skin and can stimulate production of skin's own hyaluronic acid resulting in improved hydration levels. It has been shown to be helpful against acne and clogged pores if used consistently (e.g over a period of 12 weeks) in high enough concentration. It can help reduce fine lines and wrinkles and improve skin tone with long-term application. Can help neutralize free radicals~0.1–0.3%

Can it cause trouble?

Irritancy
1 strong irritant: Sorbitan sesquioleate
Medium risk
We flagged 6 ingredients with irritancy potential. Severity depends on your sensitivity threshold; the table lists the worst offenders first.
IngredientFunctionIrritationEst. amount
Sorbitan sesquioleateUsed to help oil and water mix together. Can be irritatingHigh~1.5–2.3%est.
Ci 15850A red colorantHigh~0.35–0.75%est.
Butyloctyl salicylateA synthetic ester of salicylic acid that is used to help disperse pigments and boost effectiveness of sunscreen ingredients. It is able to absorb UV light (working as an organic, or chemical filter), but is not approved as a sunscreen ingredient on its ownMedium~4.1–6.2%est.
Ethylhexyl methoxycryleneHelps improve stability of sunscreen filters and boost their effectivenessMedium~2.2–3.3%est.
Hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymerA gelling agent that thickens the product consistency and leaves the skin with a velvety finishMedium~1.3–2%est.
GluconolactoneA polyhydroxy acid (PHA) that helps shed the dead cells from the skin surface revealing smoother skin. Is believed to be genter than AHAs. It helps attract water to the upper layer of the skin and can stimulate production of skin's own hyaluronic acid resulting in improved hydration levels. It has been shown to be helpful against acne and clogged pores if used consistently (e.g over a period of 12 weeks) in high enough concentration. It can help reduce fine lines and wrinkles and improve skin tone with long-term application. Can help neutralize free radicalsMedium~0.1–0.3%est.
Comedogenic
3 ingredients rated 2 or more on the 0–5 pore-clogging scale
3 flagged
These ingredients have a comedogenic rating of 2 or more on a 0–5 scale; the table shows each one's rating. In leave-on products they can clog pores in acne-prone skin.
IngredientFunctionRatingEst. amount
Chondrus crispusRed algae extract that helps attract water to the upper layer of the skin and create a nicer product consistency3/5~0.5–1.15%est.
Chondrus crispusRed algae extract that helps attract water to the upper layer of the skin and create a nicer product consistency3/5~0.2–0.8%est.
Fucus vesiculosus extract—3/5~0.2–0.75%est.

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Ingredients

Filter by role to see what each ingredient is doing.

Zinc oxide10%
UV filterKey active
Irritation risk
Low
Works for
Sun protection

A broad spectrum sunblock (protects from both UVA and UVB rays). Is suitable for most sensitive skins. In small concentrations, can be used as a colorant

More about Zinc oxide
C13-15 alkane~24–36%
Formula
Irritation risk
Low

Helps dissolve other ingredients in the formula

More about C13-15 alkane
Dimethicone/vinyl dimethicone crosspolymer~5.9–8.9%
Formula
Irritation risk
Low

Used to stabilize product formulations and create a nice product texture

More about Dimethicone/vinyl dimethicone crosspolymer
Butyloctyl salicylate~4.1–6.2%
UV filterKey activeIrritant · medium
Irritation risk
Medium
Works for
Sun protection

A synthetic ester of salicylic acid that is used to help disperse pigments and boost effectiveness of sunscreen ingredients. It is able to absorb UV light (working as an organic, or chemical filter), but is not approved as a sunscreen ingredient on its own

More about Butyloctyl salicylate
Tridecyl salicylate~2.8–4.2%
Formula
Ethylhexyl methoxycrylene~2.2–3.3%
Irritant · medium
Irritation risk
Medium

Helps improve stability of sunscreen filters and boost their effectiveness

More about Ethylhexyl methoxycrylene
Polymethylsilsesquioxane~1.8–2.7%
Key active
Irritation risk
Low
Works for
Moisturizing

A silicone that improves product texture and helps dissolve other ingredients. Can form a non-greasy film on the skin to prevent moisture loss

More about Polymethylsilsesquioxane
Sorbitan sesquioleate~1.5–2.3%
Irritant · high
Irritation risk
High
Works for
Cleansing

Used to help oil and water mix together. Can be irritating

More about Sorbitan sesquioleate
Hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer~1.3–2%
Irritant · medium
Irritation risk
Medium

A gelling agent that thickens the product consistency and leaves the skin with a velvety finish

More about Hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer
Squalane~1.2–1.8%
Key active
Irritation risk
Low
Works for
Moisturizing

An oil naturally present in skin. Works as an emollient to soften the skin and form a protective layer on its surface without a greasy feeling.

More about Squalane
Bisabolol~0.85–1.25%
Formula
Irritation risk
Low
Works for
Reduces irritationAnti-inflammatoryAnti-oxidation

An active component of chamomile plant that historically has been used to calm down irritated skin. A recent study shows that bisabolol indeed can have some anti-inflammatory effect on skin, even though conclusive data is lacking. Bisabolol has a sweet floral scent and can be added to products for its aromatic properties

More about Bisabolol
Cystoseira tamariscifolia extract~0.55–1.25%
Formula
Sarcothalia circumcincta (red
Not recognized
Chondrus crispus~0.5–1.15%
Key activeComedogenic 3/5
Irritation risk
Low
Comedogenicity
3/5
Works for
Moisturizing

Red algae extract that helps attract water to the upper layer of the skin and create a nicer product consistency

More about Chondrus crispus
Kousou~0.4–0.95%
Formula
Irritation risk
Low
More about Kousou
Ci 15850~0.35–0.75%
Irritant · high
Irritation risk
High

A red colorant

More about Ci 15850
Chondrus crispus~0.2–0.8%
Key activeComedogenic 3/5
Irritation risk
Low
Comedogenicity
3/5
Works for
Moisturizing

Red algae extract that helps attract water to the upper layer of the skin and create a nicer product consistency

More about Chondrus crispus
Fucus vesiculosus extract~0.2–0.75%
Comedogenic 3/5
Irritation risk
Low
Comedogenicity
3/5
More about Fucus vesiculosus extract
Camellia sinensis leaf extract~0.15–0.55%
Formula
Irritation risk
Low
Works for
Anti-oxidationAntibacterialAnti-agingEvens skin toneMoisturizingAnti-blemish

Can contain potent anti-oxidant compounds (abbreviated ECG, GCG, EGC, and EGCG) that might help protect the skin from free radicals. Can help calm down inflammation and has some anti-bacterial properties. Unfortunately, these antioxidants are unstable and lose their effectiveness very quickly in products. The concentration of the antioxidant compounds in the extract also tends to be low to be effective in topical formulation

More about Camellia sinensis leaf extract
Cyathea medullaris leaf extract~0.1–0.4%
Formula
Gluconolactone~0.1–0.3%
Under-dosedIrritant · medium
Irritation risk
Medium
Works for
MoisturizingAnti-agingEvens skin toneExfoliationAnti-oxidationAnti-blemish

A polyhydroxy acid (PHA) that helps shed the dead cells from the skin surface revealing smoother skin. Is believed to be genter than AHAs. It helps attract water to the upper layer of the skin and can stimulate production of skin's own hyaluronic acid resulting in improved hydration levels. It has been shown to be helpful against acne and clogged pores if used consistently (e.g over a period of 12 weeks) in high enough concentration. It can help reduce fine lines and wrinkles and improve skin tone with long-term application. Can help neutralize free radicals

More about Gluconolactone
Tocopherol~0.1–0.3%
Formula
Irritation risk
Low
Works for
Anti-oxidationAnti-inflammatoryAnti-agingMoisturizing

Pure form of vitamin E. Can help moisturise and protect the skin from free radicals. Often used to help stabilise other ingredients or the formula itself

More about Tocopherol
Ribes nigrum~0.1–0.35%
Formula
Irritation risk
Low
More about Ribes nigrum
Ingredient list view

Zinc oxide, C13-15 alkane, Dimethicone/vinyl dimethicone crosspolymer, Butyloctyl salicylate, Tridecyl salicylate, Ethylhexyl methoxycrylene, Polymethylsilsesquioxane, Sorbitan sesquioleate, Hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer, Squalane, Bisabolol, Cystoseira tamariscifolia extract, Unknown, Chondrus crispus, Kousou, Ci 15850, Chondrus crispus, Fucus vesiculosus extract, Camellia sinensis leaf extract, Cyathea medullaris leaf extract, Gluconolactone, Tocopherol, Ribes nigrum

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$29.99
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Worth comparing, line by line.

Match % combines shared ingredients, the first five ingredients, shared actives and hero ingredients, irritancy (lower counts in the alternative's favour), texture and body area. Only products in the same routine step are compared.

Side-by-side comparison of this product against its closest alternatives
The Seaweed Bath Co.Invisible Mineral SPF 50YOUR PRODUCTOsea MalibuMarine Screen SPF 50 Mineral SunscreeninnisfreeDAILY UV DEFENSE MINERAL SUNSCREEN SPF 50Dr Dennis GrossAll-Physical Lightweight Wrinkle Defense Broad Spectrum Sunscreen SPF 30 PA++++
Match—36%35%35%
Price$29.99$42.00+$12.01—$41.84+$11.85
Shared key ingredients—4 of 74 of 73 of 7
Key difference—PanthenolMadecassosideFerulic Acid
Irritancy Medium Low Low Low
SPFSPF 50SPF 50SPF 50SPF 30
Drying alcohol————
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Product summary

We assess that "Seaweed Bath Co. - Invisible Mineral SPF 50" can provide reliable sun protection based on the ingredient list. We love that it can protect from both UVA and UVB rays (not all sunscreens with SPF ratings give UVA protection. UVA rays do not cause sunburn, but still damage our skin and lead to early aging).

Because it includes good moisturizing ingredients, it can also work as a hydrating day cream. This product prevents early signs of aging by protecting against sun damage (all broad spectrum sunscreens do that).

Sunscreen filters

This sunscreen uses a mixture of both mineral and organic (so-called "chemical") UV filters. Here are the organic filters this product uses: butyloctyl salicylate. As for the mineral filters, this sunscreen uses zinc oxide.

Irritation risk

It contains some common irritants, including those without a benefit for the skin. We assess the overall irritancy of it to be medium. For a detailed overview of all potential irritants: click here

You can see the detailed formula review with the breakdown of all actives in the product and the full ingredient list with estimated concentrations in the tables below.

Sources cited in this review

Every concentration estimate and effectiveness label is anchored to one of these 22 studies and safety reviews.

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The Seaweed Bath Co. Invisible Mineral SPF 50
The Seaweed Bath Co.Invisible Mineral SPF 50

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As an Amazon Associate, WIMJ earns from qualifying purchases.