Ingredient review
Polysilicone-27
INCI: POLYSILICONE-27
Polysilicone-27 is a gentle film-forming silicone that helps makeup and sunscreen stay put without clogging pores.
In plain English
Polysilicone-27 is a type of silicone that spreads easily on skin and dries down to a flexible, invisible film. This film helps other ingredients—like sunscreen filters or pigments—stay in place longer, even when you sweat or get wet. It feels smooth and lightweight, not greasy or sticky.
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-27 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-27.
- 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-27 is a synthetic silicone polymer designed to form a thin, breathable film on the skin or hair. It is part of a family of silicones used to improve product performance and sensory feel.
How it works
When applied, Polysilicone-27 spreads into an even layer and then dries to create a flexible, water-resistant film. This film locks in active ingredients and helps them resist rubbing off or washing away. It also gives a silky, smooth finish without heavy residue.
Pros
Boosts water resistance
Helps sunscreens and makeup stay effective longer during sweating or swimming.
Smooth, lightweight feel
Leaves a silky finish without heavy or sticky residue, making it pleasant for daily wear.
Cons and cautions
Requires thorough cleansing
Because it forms a film, it may not wash off with a gentle cleanser alone; an oil-based or micellar cleanser is often needed.
Silicone buildup risk
If not fully removed, repeated use can lead to a layer of silicone on skin that may interfere with other products.
Best for
- People who want long-wearing makeup or water-resistant sunscreen
- Those with oily or combination skin who prefer a matte finish
Use caution if
- Those who prefer silicone-free routines
- People who do not double-cleanse and worry about buildup
Usage tips
Safety summary
Polysilicone-27 is considered safe for cosmetic use at typical concentrations. It has low irritation and comedogenic potential. No significant safety concerns have been raised by regulatory bodies.
Research notes
Research on Polysilicone-27 is limited, but it is structurally similar to other well-studied film-forming silicones. Safety assessments by the Cosmetic Ingredient Review (CIR) panel for related silicones support its safe use in cosmetics.
Common label clues
- Typical concentration
- 1% to 10%
- Regulatory status
- Approved for use in cosmetics in the US (FDA) and EU (CosIng) with no known restrictions at typical concentrations.
- Common uses
- Sunscreens, Long-wear foundations, Water-resistant makeup
- Environmental note
- Like many silicones, Polysilicone-27 may not biodegrade quickly. However, it is not classified as bioaccumulative. Some brands are moving toward biodegradable alternatives.
Good to know
- Polysilicone-27 is considered non-comedogenic and safe for most skin types.
- It is commonly found in 'waterproof' or 'long-wear' labeled products.
Common questions
What is Polysilicone-27 in beauty products?
Polysilicone-27 is a type of silicone that spreads easily on skin and dries down to a flexible, invisible film. This film helps other ingredients—like sunscreen filters or pigments—stay in place longer, even when you sweat or get wet. It feels smooth and lightweight, not greasy or sticky.
What does Polysilicone-27 do in a beauty product?
When applied, Polysilicone-27 spreads into an even layer and then dries to create a flexible, water-resistant film. This film locks in active ingredients and helps them resist rubbing off or washing away. It also gives a silky, smooth finish without heavy residue.
Is Polysilicone-27 safe for most people?
Polysilicone-27 is considered safe for cosmetic use at typical concentrations. It has low irritation and comedogenic potential. No significant safety concerns have been raised by regulatory bodies.
Who should be careful with Polysilicone-27?
Those who prefer silicone-free routines People who do not double-cleanse and worry about buildup
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.