Ingredient review

Polyamide-6

INCI: Polyamide-6

Polyamide-6 is a safe, synthetic film-former that helps cosmetics stay put without clogging pores.

beautyskincarefilm-former

In plain English

Polyamide-6 is a type of nylon plastic that is ground into a fine powder and used in cosmetics. When applied, it forms a thin, flexible film on your skin or hair. This film helps makeup last longer, prevents smudging, and gives a smooth, silky feel. It is not absorbed into the skin and is considered very safe for topical use.

Review score

Safety, usefulness, and evidence

3.8Good
3.8/ 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

Polyamide-6 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 Polyamide-6.
  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

Polyamide-6 is a synthetic polymer, specifically a type of nylon, produced by polymerizing caprolactam. In cosmetics, it is used as a fine powder that acts as a film-former and texture enhancer.

How it works

When applied, Polyamide-6 particles spread evenly and fuse into a continuous, breathable film on the skin or hair surface. This film improves the water resistance and wear time of products like mascara and eyeliner, while also providing a soft-focus effect by scattering light.

Pros

Long-lasting wear

Helps mascara, eyeliner, and lip products resist smudging and fading throughout the day.

Smooth texture

Gives a silky, non-greasy feel to formulas, improving the overall application experience.

Cons and cautions

Synthetic origin

Derived from petroleum-based sources, which may be a concern for those seeking natural or sustainable ingredients.

Potential dryness

In high concentrations, the film can feel slightly tight or drying on very dry skin or hair.

Best for

  • Anyone looking for long-wearing, smudge-proof makeup
  • People with oily skin who want products that stay in place

Use caution if

  • Those who strictly avoid all synthetic ingredients
  • Individuals with very dry skin may prefer more emollient film-formers

Usage tips

Use in combination with humectants or emollients to balance any potential drying effect.
Ideal for water-resistant or long-wear formulations where durability is key.

Safety summary

Polyamide-6 is considered safe for use in cosmetics. It is not absorbed through the skin, has low irritation and comedogenic potential, and is approved by major regulatory bodies.

Research notes

The Cosmetic Ingredient Review (CIR) panel reviewed Polyamide-6 and concluded it is safe for use in cosmetics at typical concentrations. No significant safety concerns have been raised in peer-reviewed literature.

Common label clues

Typical concentration
0.5% to 5% in most leave-on formulas
Regulatory status
Approved for use in cosmetics in the EU, USA, and many other regions. The Cosmetic Ingredient Review (CIR) panel has deemed it safe as used.
Common uses
Mascaras, Eyeliners, Lip products, Hair styling products
Environmental note
As a synthetic polymer, Polyamide-6 is not biodegradable. However, it is used in very small amounts and is not considered a major environmental concern compared to larger plastic particles.

Good to know

  • Polyamide-6 is also used in textiles and engineering plastics, but the cosmetic-grade version is purified and safe for skin contact.
  • It is not the same as microplastics used in exfoliating scrubs; it is a film-former, not a scrub particle.

Common questions

What is Polyamide-6 in beauty products?

Polyamide-6 is a type of nylon plastic that is ground into a fine powder and used in cosmetics. When applied, it forms a thin, flexible film on your skin or hair. This film helps makeup last longer, prevents smudging, and gives a smooth, silky feel. It is not absorbed into the skin and is considered very safe for topical use.

What does Polyamide-6 do in a beauty product?

When applied, Polyamide-6 particles spread evenly and fuse into a continuous, breathable film on the skin or hair surface. This film improves the water resistance and wear time of products like mascara and eyeliner, while also providing a soft-focus effect by scattering light.

Is Polyamide-6 safe for most people?

Polyamide-6 is considered safe for use in cosmetics. It is not absorbed through the skin, has low irritation and comedogenic potential, and is approved by major regulatory bodies.

Who should be careful with Polyamide-6?

Those who strictly avoid all synthetic ingredients Individuals with very dry skin may prefer more emollient film-formers

Research sources

Cosmetic Ingredient Review (CIR) - Safety Assessment of PolyamidesOpenPubChem - Polyamide-6OpenEuropean Chemicals Agency (ECHA) - Polyamide-6Open

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.