Mineral Sunscreen Without Silicones: How to Find One

Swellies is a mineral sunscreen with no silicones anywhere in the formula, including the coating on the zinc. It is five ingredients: non-nano zinc oxide at 21 percent, Coco Caprylate/Caprate, Dextrin Palmitate, Polyhydroxystearic Acid, and Iron Oxides. Broad Spectrum SPF 46, water resistant 40 minutes. If you are trying to find a mineral sunscreen without silicones, that is the short answer. The longer one is how to check any bottle yourself, because silicone shows up in places most labels do not make obvious.

Why most mineral sunscreens use silicone

Zinc oxide at a real protective level is a difficult ingredient. At 20 percent and up it is thick, it drags when you spread it, and it wants to sit on your skin as a white layer. Formulators have two ways to deal with that. Build the formula around ingredients that handle it, or add silicone.

Silicone is the fast option. It adds slip so the zinc spreads, it leaves a dry finish, and it helps keep the zinc particles from clumping. It works, it is inexpensive, and so it ends up in the majority of mineral sunscreens on the shelf, often two or three different silicones in one bottle.

Why people look for silicone-free

Read enough reviews and forum threads and the reasons repeat. Some people do not like the slick, coated feel. Some find silicone-heavy products pill when they layer them with skincare or makeup. Some want a short ingredient list they can read start to finish. Some avoid the cyclic silicones for environmental reasons.

For the record, dimethicone is an FDA-approved skin protectant, so this is not a safety argument. It is a preference, and a common one. If it is yours, the useful thing is knowing how to shop for it.

Three places silicone hides in a mineral sunscreen

"Mineral" on the front of a bottle describes the active ingredient. It says nothing about the other twenty. Silicone tends to show up in three spots.

• The base. The easy one to spot. Dimethicone and cyclopentasiloxane are often near the top of the inactive list, which means there is a lot of them.
• The texture and film formers. Further down the list and easier to miss: dimethicone crosspolymer, trimethylsiloxysilicate, caprylyl methicone. These control the finish and how the product sets.
• The zinc coating. The one almost nobody checks. Most cosmetic zinc oxide is surface-coated so it disperses evenly, and a very common coating is triethoxycaprylylsilane or dimethicone. That coating has to appear on the ingredient list, but it is usually buried mid-label under a name that does not look anything like "silicone." A formula can have a silicone-free base and still carry silicone on the active itself.

That third one is why we are specific about ours. Swellies uses non-nano zinc oxide coated with Polyhydroxystearic Acid, a castor-derived ingredient that keeps the zinc evenly dispersed. The supplier's safety data sheet lists exactly two components, zinc oxide and polyhydroxystearic acid, and that coating is the same Polyhydroxystearic Acid you see on our label.

How to read a label for silicones

Flip the bottle to the inactive ingredients and look for these endings:

• -cone: dimethicone, cyclomethicone, phenyl trimethicone, caprylyl methicone
• -conol: dimethiconol
• -siloxane: cyclopentasiloxane, cyclohexasiloxane
• -silane: triethoxycaprylylsilane, the common zinc coating
• -siloxysilicate: trimethylsiloxysilicate
• Crosspolymers with "dimethicone" or "vinyl dimethicone" in the name

Two things that sound similar and are not silicones: silica and magnesium aluminum silicate. Those are a mineral and a clay. The exception is silica dimethyl silylate, which is silica treated with a silicone, so that one counts.

Also worth knowing: "silicone-free" on the front of a package is not a regulated claim. The inactive ingredient list is the only place that tells you. We wrote a full guide to reading the rest of it in where the formula hides on a label.

What replaces silicone in Swellies

Taking silicone out means every job it was doing still has to get done. Here is who does each one.

Coco Caprylate/Caprate is the carrier, the thing the zinc rides in. It is an ester, not an oil and not a silicone, so it spreads light and does not leave a greasy film.

Dextrin Palmitate is built from a plant starch and a fatty acid. It gives the formula its gel structure and controls the finish, which is the job crosspolymers usually handle.

Polyhydroxystearic Acid is on the zinc itself. It keeps the particles separated so they lay down in an even film instead of clumping, and that even film is half of why there is no white cast. Iron Oxides handle the other half with a sheer tint.

The result wears as a lightweight serum-like gel. More on how those five were chosen in naturally derived, and only five, and on the finish in mineral sunscreen that isn't greasy.

The environmental piece

Silicone's backbone is silicon and oxygen rather than carbon, which is why it does not break down the way most organic ingredients do. The cyclic silicones get the most regulatory attention. The European Union has restricted D4 and D5 in rinse-off cosmetics since 2020, and from June 2027 the limit extends to D5 and D6 in leave-on products like sunscreen.

Swellies is labeled Reef and River Minded, and leaving out silicones is part of how the river half of that holds up. We covered what persists in lakes and streams in is my sunscreen safe for freshwater.

Where Swellies fits

If you are shopping for a mineral sunscreen without silicones, Swellies is built for exactly that search. One active, non-nano zinc oxide at 21 percent, covering UVA and UVB on its own. Four supporting ingredients, none of them silicone, including the coating on the zinc. No fragrance, no preservatives, no seed oils, no water.

Five ingredients means you can check every one of them in about ten seconds, which is the whole point. We make the longer case for short lists in 5 ingredients vs. 30.

Frequently asked questions

Is there a mineral sunscreen without silicones?

Yes. Swellies is a mineral sunscreen with no silicones, including in the coating on the zinc oxide. Its five ingredients are non-nano zinc oxide at 21 percent, Coco Caprylate/Caprate, Dextrin Palmitate, Polyhydroxystearic Acid, and Iron Oxides. It is Broad Spectrum SPF 46 and water resistant for 40 minutes.

Does mineral sunscreen have silicone in it?

Many do. "Mineral" describes the active ingredient only. Silicones are common in the base, in texture agents, and in the coating applied to zinc oxide, so a mineral sunscreen can contain several. Check the inactive ingredient list to know for sure.

How can I tell if a sunscreen has silicones?

Look at the inactive ingredients for names ending in -cone, -conol, -siloxane, or -silane, such as dimethicone, cyclopentasiloxane, dimethiconol, and triethoxycaprylylsilane. Also watch for trimethylsiloxysilicate and crosspolymers containing dimethicone. "Silicone-free" on the front of a package is not a regulated claim, so the ingredient list is the reliable source.

Is zinc oxide coated with silicone?

Often. Cosmetic zinc oxide is usually surface-coated so it disperses evenly, and triethoxycaprylylsilane and dimethicone are common coatings. Other coatings exist. The zinc oxide in Swellies is coated with Polyhydroxystearic Acid, a castor-derived ingredient, and contains no silicone or silane.

Is silica a silicone?

No. Silica is a mineral, and magnesium aluminum silicate is a clay. Neither is a silicone. The exception is silica dimethyl silylate, which is silica that has been treated with a silicone.

Why do people avoid silicones in sunscreen?

Common reasons include disliking the slick or coated feel, pilling when layering with other products, preferring a short readable ingredient list, and environmental concerns about cyclic silicones, which the European Union restricts in rinse-off cosmetics and will restrict in leave-on products from June 2027. Dimethicone itself is an FDA-approved skin protectant, so avoiding it is a preference rather than a safety requirement.

What replaces silicone in a silicone-free sunscreen?

In Swellies, Coco Caprylate/Caprate provides the slip that helps zinc spread, Dextrin Palmitate creates the gel texture and dry finish, and a Polyhydroxystearic Acid coating keeps the zinc evenly dispersed so there is no white cast. Iron Oxides add a sheer tint.

Five ingredients. No silicones, not even on the zinc. See Swellies →