Ingredient review

Cyclohexasiloxane

INCI: Cyclohexasiloxane

A lightweight silicone that creates a smooth, silky feel on skin and hair without clogging pores.

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In plain English

Cyclohexasiloxane is a type of silicone that feels very light and silky on the skin. It evaporates slowly, leaving a smooth, non-greasy finish. It helps other ingredients spread more easily and can make makeup or sunscreen feel more comfortable. It is often used in primers and moisturizers to give a velvety texture.

Review score

Safety, usefulness, and evidence

4.0Good
4.0/ 5

Potentially useful with some tradeoffs

The evidence base is useful, but some claims depend heavily on the formula.

Risk flags are low for most users, though the finished product can still irritate.

Source
synthetic
Evidence
moderate
Irritation
low
Clogging risk
low
How reviews are scored

Quick decision guide

Useful, but context matters

Cyclohexasiloxane is generally a lower-concern ingredient when the full formula suits your skin.

Plain-English read

Treat this as a practical screening step before you compare products that contain this ingredient.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging Cyclohexasiloxane.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.

Score terms in plain English

Irritation risk

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

A cyclic silicone (a ring-shaped molecule) made from silicon and oxygen, used as an emollient and solvent in cosmetics.

How it works

It forms a thin, breathable film on the skin or hair that reduces friction, improves spreadability, and gives a smooth, silky feel. It also helps dissolve other ingredients and can enhance the texture of a product.

Pros

Lightweight feel

It gives a silky, non-greasy finish that works well for oily or combination skin types.

Improves product texture

Helps creams, serums, and makeup glide on smoothly and evenly, enhancing the user experience.

Cons and cautions

Silicone concerns

Some people choose to avoid silicones due to environmental persistence or personal preference, though it is considered safe for use.

Potential buildup

On hair, frequent use without proper cleansing can lead to buildup, making hair feel heavy or dull.

Best for

  • People with oily or combination skin who want a lightweight, matte finish
  • Anyone looking for a smooth, primer-like texture in their skincare or makeup

Use caution if

  • Those who prefer silicone-free products for environmental or personal reasons

Usage tips

Use a clarifying shampoo occasionally if you use silicone-heavy hair products to prevent buildup.
Apply silicone-based primers after moisturizer and before foundation for a smooth makeup base.

Safety summary

Cyclohexasiloxane is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential. However, environmental concerns have led to restrictions in some regions for rinse-off products.

Research notes

Studies show cyclohexasiloxane is not a significant skin irritant or sensitizer. It is not absorbed through the skin in meaningful amounts. Environmental persistence is the main concern, not human safety.

Common label clues

Typical concentration
1% to 15%
Regulatory status
Approved for use in cosmetics in the US, EU, and many other regions. The EU has restricted the concentration of cyclic silicones in rinse-off products due to environmental concerns, but leave-on products are not affected.
Common uses
Moisturizers, Serums, Primers, Sunscreens, Hair Conditioners
Environmental note
Cyclic silicones like cyclohexasiloxane are persistent in the environment and can accumulate in aquatic life. This has led to some regulatory restrictions in rinse-off products in the EU.

Good to know

  • Cyclohexasiloxane is often part of a group called cyclomethicones, which are cyclic silicones.
  • It evaporates more slowly than smaller cyclic silicones like cyclopentasiloxane, giving a longer-lasting silky feel.

Common questions

What is Cyclohexasiloxane in beauty products?

Cyclohexasiloxane is a type of silicone that feels very light and silky on the skin. It evaporates slowly, leaving a smooth, non-greasy finish. It helps other ingredients spread more easily and can make makeup or sunscreen feel more comfortable. It is often used in primers and moisturizers to give a velvety texture.

What does Cyclohexasiloxane do in a beauty product?

It forms a thin, breathable film on the skin or hair that reduces friction, improves spreadability, and gives a smooth, silky feel. It also helps dissolve other ingredients and can enhance the texture of a product.

Is Cyclohexasiloxane safe for most people?

Cyclohexasiloxane is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential. However, environmental concerns have led to restrictions in some regions for rinse-off products.

Who should be careful with Cyclohexasiloxane?

Those who prefer silicone-free products for environmental or personal reasons

Research sources

Cosmetic Ingredient Review (CIR) Safety AssessmentOpenEuropean Chemicals Agency (ECHA) - CyclohexasiloxaneOpenPubMed - Safety of Cyclic SiliconesOpen

Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.