Ingredient review
Polysilicone-5
INCI: POLYSILICONE-5
Polysilicone-5 is a gentle film-forming silicone that helps products spread smoothly and resist water, but it may not suit those avoiding silicones.
In plain English
Polysilicone-5 is a type of silicone that forms a thin, flexible film on your skin or hair. This film helps other ingredients stay in place, makes the product feel silky, and can provide a light water-resistant barrier. It's often used in primers and sunscreens to improve wear time and texture.
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-5 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-5.
- 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-5 is a synthetic silicone polymer designed to create a uniform, breathable film on the skin or hair. It belongs to the broader family of silicone film formers used in cosmetics.
How it works
When applied, Polysilicone-5 spreads into a thin, even layer that dries down to a flexible, non-sticky film. This film helps lock in other ingredients, reduces water loss from the skin, and gives a smooth, velvety feel. On hair, it coats strands to reduce frizz and add shine.
Pros
Smooth texture
Polysilicone-5 gives a silky, velvety feel to products, making them glide on easily and reducing the need for heavy oils or waxes.
Water resistance
It helps sunscreens and makeup stay put longer, even in humid conditions or light water exposure, without feeling heavy.
Cons and cautions
Silicone buildup
On hair, regular use without clarifying shampoo can lead to buildup, making hair feel weighed down or dull over time.
Not biodegradable
As a synthetic silicone, Polysilicone-5 is not readily biodegradable, which may be a concern for environmentally conscious users.
Best for
- People looking for a smooth, long-lasting makeup base
- Those wanting a water-resistant sunscreen that feels lightweight
Use caution if
- Individuals who prefer silicone-free or minimalist ingredient lists
- Those with very oily or acne-prone skin who find silicones too occlusive
Usage tips
Safety summary
Polysilicone-5 has a low irritation and comedogenic risk, making it suitable for most skin types. It is considered safe in typical cosmetic concentrations, though those with very sensitive skin may want to patch test.
Research notes
Research on Polysilicone-5 specifically is limited, but the broader class of film-forming silicones is well-studied and generally recognized as safe for topical use. Studies show they improve product aesthetics and water resistance without significant skin penetration.
Common label clues
- Typical concentration
- Typically 0.5% to 5% in leave-on products
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions. The Cosmetic Ingredient Review (CIR) panel has reviewed similar silicones and found them safe as used.
- Common uses
- Primers, Foundations, Sunscreens, Hair serums, Leave-in conditioners
- Environmental note
- Silicones like Polysilicone-5 are not biodegradable and can accumulate in the environment. Some brands are moving toward biodegradable alternatives.
Good to know
- Polysilicone-5 is often used in combination with other silicones to fine-tune texture and film properties.
- It is considered safe for use in cosmetics by major regulatory bodies at typical concentrations.
Common questions
What is Polysilicone-5 in beauty products?
Polysilicone-5 is a type of silicone that forms a thin, flexible film on your skin or hair. This film helps other ingredients stay in place, makes the product feel silky, and can provide a light water-resistant barrier. It's often used in primers and sunscreens to improve wear time and texture.
What does Polysilicone-5 do in a beauty product?
When applied, Polysilicone-5 spreads into a thin, even layer that dries down to a flexible, non-sticky film. This film helps lock in other ingredients, reduces water loss from the skin, and gives a smooth, velvety feel. On hair, it coats strands to reduce frizz and add shine.
Is Polysilicone-5 safe for most people?
Polysilicone-5 has a low irritation and comedogenic risk, making it suitable for most skin types. It is considered safe in typical cosmetic concentrations, though those with very sensitive skin may want to patch test.
Who should be careful with Polysilicone-5?
Individuals who prefer silicone-free or minimalist ingredient lists Those with very oily or acne-prone skin who find silicones too occlusive
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.