PRODUCT REVIEW
Mineral Fusion Brush-On Sun Defense
A zinc oxide powder with a built-in brush, cheaper than its competitors. Like all of them, a top-up and not a sunscreen.
Key facts
Mineral Fusion Brush-On Sun Defense at a glance.
Zinc oxide 24% (SPF 30)
Key active
SPF 30 mineral powder
Texture
Reapplying over makeup; oil control
Best for
$30
Approximate price
0.14 oz
Size
$29.99
Price
Sunscreen
Type
What is it?
Top things to know about Mineral Fusion Brush-On Sun Defense
- Mineral Fusion Brush-On Sun Defense is an SPF 30 sunscreen powder in a 0.14 oz compact with a brush in the lid, for about $30. It is a top-up, not the sunscreen you start the day with, and the faint tint is there to keep it invisible.
- The only filter is zinc oxide at 24 percent, a heavy load for a powder, carried in mica, silica and boron nitride, which give slip and soak up oil, with iron oxides for color. That is why it mattifies as much as it protects, and goes over makeup without disturbing it.
Mineral Fusion Brush-On Sun Defense is a reapplication tool, not the sun protection you start the day with. It carries 24% zinc oxide, but people apply roughly a tenth of the thickness the SPF was tested at. Put a proper sunscreen on in the morning and dust this over makeup at lunchtime.
— Dr. Schwarz
Skin fit
Is it right for your skin?
Oily Skin
The silica and mica absorb oil, so a midday reapplication takes the shine down instead of adding to it. That is why people who give up on reapplying a lotion stick with this.
Sun Damage
UV damage adds up across a day, and the sunscreen you put on at eight is largely gone by mid-afternoon. Something applied at lunchtime is worth more than a better product you will not reapply. Start with a proper lotion, though — a powder alone never reaches its labeled SPF.
Melasma
Melasma is set off by visible light as well as UV, and the iron oxides here block some of it. Reapplying matters more in melasma than almost anywhere else.
Texture
What it feels like on skin.
Powder
Mineral Fusion Brush-On Sun Defense is a fine, faintly tinted powder that comes through the brush head, without the chalkiness some SPF powders have. It goes on dry and sits matte, and over makeup it does not lift or streak what is underneath. The compact is tiny at 0.14 oz and the brush needs twisting to load, so building an even layer takes longer than it looks.
Alternatives
If this isn’t the right product for you
EltaMD UV Clear
A lotion is the better morning layer. Oil-free and fragrance-free with 5% niacinamide, and it sits well under makeup.
Supergoop! (Re)setting Powder
The same job at 24.7% zinc, talc-free and fragrance-free with ceramides. Also a top-up, never your only layer.
Cetaphil Mineral Stick
Another fragrance-free way to top up, and the better tool for ears, nose and hairline.
Ingredients · Interactive
What’s in it, and where each ingredient works.
Full ingredient list · 24 ingredients, in label order. Click one.
A light oil made from coconut oil and glycerin. It smooths and softens the surface.
Vitamin E, an antioxidant. Here it mainly keeps the oils in the product from going rancid.
How to use it
How to use it.
How to apply it
- How muchKeep going until the layer is visible and even. Studies of SPF powders find people apply roughly a tenth of the amount an SPF is tested at, which is why powder alone falls short.
- ReapplyEvery two hours outdoors, and after sweating. Over makeup that is far easier than a lotion.
- CarefulThe brand's own instruction to apply liberally 15 minutes before sun exposure reads as though the powder can be your only protection. It cannot.
What to expect
- What to expectShine drops immediately and makeup stays put. Protection lasts only as long as the layer stays on your face.
Questions
Common questions.
Is Mineral Fusion Brush-On Sun Defense mineral or chemical?
Mineral. The only active is zinc oxide.
Can I use Mineral Fusion Brush-On Sun Defense as my only sunscreen?
No. It is a top-up over a base sunscreen.
Will Mineral Fusion Brush-On Sun Defense leave a white cast?
The finish is translucent, but a heavy layer can look chalky.
Can I reapply Mineral Fusion Brush-On Sun Defense over makeup?
Yes. That is its main use.
Is Mineral Fusion Brush-On Sun Defense fragrance-free?
The label does not say.
What SPF is Mineral Fusion Brush-On Sun Defense?
SPF 30.
References
Sources.
- 1. Titanium dioxide and zinc oxide nanoparticles in sunscreens: focus on their safety and effectiveness (https://pmc.ncbi.nlm.nih.gov/articles/PMC3781714) — Confirms zinc oxide is a mineral UV filter providing broad-spectrum (notably UVA) protection and that micronized mineral particles reduce the opaqueness/chalkiness of the finish. Link
- 2. Sunscreen: How to Help Protect Your Skin from the Sun (https://www.fda.gov/drugs/understanding-over-counter-medicines/sunscreen-how-help-protect-your-skin-sun) — Backs the 'apply 15 minutes before sun exposure' instruction language and the claim that sunscreen cannot be your only protection (must be combined with other sun-protective measures). Link
- 3. Sunscreen FAQs (https://www.aad.org/media/stats-sunscreen) — Supports that sunscreen must be reapplied roughly every two hours and that sunscreen alone cannot fully protect you, reinforcing that a reapplication powder is a supplement, not sole protection. Link
- 4. Mineral Makeup & Natural Cosmetics / Mineral Fusion (https://mineralfusion.com/) — Confirms the Mineral Fusion brand claim that its products are free of parabens and phthalates ('No parabens, gluten, phthalates or other harsh ingredients are used'). Link