Ingredient review
Polyamide Film Former
INCI: ISOPHORONE DIAMINE/CYCLOHEXYLAMINE/ISOPHTHALIC ACID/AZELAIC ACID COPOLYMER
A synthetic film former that helps makeup and sunscreen stay put, but offers no skincare benefit and may feel tight on dry skin.
In plain English
This ingredient is a type of plastic-like polymer that dries down to a clear, flexible film on your skin or hair. Think of it like an invisible, breathable wrap that helps makeup last longer or keeps hair in place. It's not absorbed into the skin and works purely on the surface.
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
Polyamide Film Former 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 Polyamide Film Former.
- 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
A high-molecular-weight synthetic copolymer created by reacting isophorone diamine, cyclohexylamine, isophthalic acid, and azelaic acid. It belongs to the polyamide family and is designed to form a continuous film when applied to skin or hair.
How it works
When the product dries, the copolymer molecules link together into a thin, flexible film. This film physically locks in pigments and other ingredients, resists water and sweat, and helps the product stay in place for hours. It also thickens the formula slightly, giving a smooth, even application.
Pros
Boosts product longevity
Creates a durable film that helps makeup and sunscreen resist smudging, fading, and water exposure for hours.
Lightweight feel
Despite being a polymer, it dries to a thin, flexible film that doesn't feel heavy or cakey on the skin.
Cons and cautions
Can feel tight on dry skin
The film-forming nature may emphasize dryness or flakiness, making skin feel tight or uncomfortable.
Requires double cleansing
Water-resistant films don't wash off with a gentle cleanser alone; you'll likely need an oil-based or balm cleanser to remove it fully.
Best for
- Anyone wanting long-lasting makeup or waterproof sunscreen
- People with oily or combination skin who struggle with makeup fading
Use caution if
- Those with very dry or dehydrated skin who dislike a tight, film-like feel
Usage tips
Safety summary
Considered safe for topical use at typical concentrations. Low irritation and comedogenic potential. No known systemic toxicity from cosmetic use. Always patch test if you have reactive skin.
Research notes
Safety data is based on general polymer toxicology and industry experience rather than specific clinical studies. No published evidence of significant irritation or sensitization in cosmetic use.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and other major markets. No specific restrictions beyond general cosmetic safety requirements.
- Common uses
- Long-wear foundations, Waterproof mascaras, Sunscreens, Hair styling products
- Environmental note
- As a synthetic polymer, it is not biodegradable. However, it is used in low concentrations and is not considered a microplastic concern in current regulatory frameworks.
Good to know
- This ingredient is not absorbed into the skin—it stays on the surface as a film.
- It is often combined with plasticizers to keep the film flexible and comfortable.
- The 'copolymer' name means it's made from multiple monomers, giving it tailored properties.
Common questions
What is Polyamide Film Former in beauty products?
This ingredient is a type of plastic-like polymer that dries down to a clear, flexible film on your skin or hair. Think of it like an invisible, breathable wrap that helps makeup last longer or keeps hair in place. It's not absorbed into the skin and works purely on the surface.
What does Polyamide Film Former do in a beauty product?
When the product dries, the copolymer molecules link together into a thin, flexible film. This film physically locks in pigments and other ingredients, resists water and sweat, and helps the product stay in place for hours. It also thickens the formula slightly, giving a smooth, even application.
Is Polyamide Film Former safe for most people?
Considered safe for topical use at typical concentrations. Low irritation and comedogenic potential. No known systemic toxicity from cosmetic use. Always patch test if you have reactive skin.
Who should be careful with Polyamide Film Former?
Those with very dry or dehydrated skin who dislike a tight, film-like feel
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.