Ingredient review
Polysilicone-16
INCI: Polysilicone-16
Polysilicone-16 is a gentle silicone that helps products glide on smoothly and leaves hair and skin feeling soft without heavy buildup.
In plain English
Polysilicone-16 is a type of silicone that forms a thin, flexible film on your skin or hair. This film helps other ingredients spread easily, reduces friction, and gives a silky, non-greasy finish. It's often used in hair conditioners to detangle and add shine, and in skincare to improve the feel of creams and serums. Because it's water-soluble, it rinses off more easily than some other silicones, so it's less likely to cause buildup.
Review score
Safety, usefulness, and evidence
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
Quick decision guide
Useful, but context matters
Polysilicone-16 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.
- Step 1Start with the score, then check the irritation and clogging risk before judging Polysilicone-16.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- 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
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
Polysilicone-16 is a synthetic silicone polymer made from repeating units of siloxane (silicon-oxygen backbone) with organic side chains. It is designed to be water-dispersible, meaning it can be formulated into clear or rinse-off products without leaving a heavy residue.
How it works
When applied, Polysilicone-16 forms a thin, breathable film on the surface of skin or hair. This film reduces friction (making hair easier to comb and skin feel smoother), helps other ingredients spread more evenly, and provides a temporary barrier that can reduce moisture loss. Its water-dispersible nature means it can be easily washed away with water and mild cleansers.
Pros
Smooth, silky finish
Creates a non-greasy, velvety feel on skin and hair, improving the sensory experience of products.
Easy to rinse off
Water-dispersible formulation means it washes away more easily than many other silicones, reducing the risk of buildup.
Cons and cautions
Not biodegradable
As a synthetic silicone, it is not readily biodegradable and may accumulate in the environment, a concern for eco-conscious consumers.
Potential for mild buildup over time
Although water-dispersible, frequent use without proper cleansing can still lead to a slight film on hair, especially for fine hair types.
Best for
- People with dry or frizzy hair looking for smoothness and shine
- Those who want a lightweight, non-greasy skin feel in moisturizers or primers
Use caution if
- Individuals following a strict silicone-free or minimalist routine
Usage tips
Safety summary
Polysilicone-16 has a low irritation and comedogenic risk. It is generally well-tolerated by most skin and hair types. Rare cases of sensitivity have been reported, but it is considered safe for cosmetic use by regulatory bodies.
Research notes
Research on Polysilicone-16 is limited but consistent with other silicone film-formers. The CIR panel reviewed data and found no significant safety concerns at typical concentrations. Most evidence comes from formulation studies rather than clinical trials.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions. The Cosmetic Ingredient Review (CIR) panel has deemed it safe as used in rinse-off and leave-on products.
- Common uses
- Hair conditioners, Leave-in treatments, Styling products, Serums, Moisturizers
- Environmental note
- Silicones like Polysilicone-16 are not biodegradable and can persist in water systems. Some brands are moving toward biodegradable alternatives, but it remains widely used due to its performance.
Good to know
- Polysilicone-16 is often listed near the middle or end of ingredient lists, indicating moderate concentration.
- It is considered safe by the Cosmetic Ingredient Review (CIR) panel at typical use levels.
Common questions
What is Polysilicone-16 in beauty products?
Polysilicone-16 is a type of silicone that forms a thin, flexible film on your skin or hair. This film helps other ingredients spread easily, reduces friction, and gives a silky, non-greasy finish. It's often used in hair conditioners to detangle and add shine, and in skincare to improve the feel of creams and serums. Because it's water-soluble, it rinses off more easily than some other silicones, so it's less likely to cause buildup.
What does Polysilicone-16 do in a beauty product?
When applied, Polysilicone-16 forms a thin, breathable film on the surface of skin or hair. This film reduces friction (making hair easier to comb and skin feel smoother), helps other ingredients spread more evenly, and provides a temporary barrier that can reduce moisture loss. Its water-dispersible nature means it can be easily washed away with water and mild cleansers.
Is Polysilicone-16 safe for most people?
Polysilicone-16 has a low irritation and comedogenic risk. It is generally well-tolerated by most skin and hair types. Rare cases of sensitivity have been reported, but it is considered safe for cosmetic use by regulatory bodies.
Who should be careful with Polysilicone-16?
Individuals following a strict silicone-free or minimalist routine
Research sources
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.