Ingredient review
Polyurethane-72
INCI: POLYURETHANE-72
Polyurethane-72 is a flexible film-former that helps makeup and hair products resist water, sweat, and smudging without feeling stiff or heavy.
In plain English
Polyurethane-72 is a synthetic ingredient that creates a thin, flexible, invisible film on your skin or hair. Think of it like a clear, breathable raincoat for your makeup or hairstyle. It helps products stay put longer, resist water and sweat, and feel more comfortable than older stiff film-formers. You'll find it in long-wear foundations, waterproof mascaras, setting sprays, and hair gels.
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
Polyurethane-72 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 Polyurethane-72.
- 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
Polyurethane-72 is a type of synthetic polymer, specifically a polyurethane resin, engineered to form a flexible, durable film on surfaces. In cosmetics, it is used as a film-forming agent to improve the wear time and water resistance of products.
How it works
When applied, the water or solvent in the product evaporates, leaving behind a thin, continuous layer of Polyurethane-72. This film adheres to the skin or hair, creating a physical barrier that locks in pigments and other ingredients, making them resistant to water, sweat, and friction. Its flexibility allows the film to move with your skin or hair without cracking or flaking.
Pros
Long-lasting wear
Creates a durable film that helps makeup and hair products resist fading, smudging, and transfer throughout the day.
Flexible and comfortable
Unlike older stiff film-formers, Polyurethane-72 forms a flexible layer that moves with your skin or hair, reducing the risk of cracking or flaking.
Cons and cautions
Can be drying
The film-forming nature may feel tight or drying on very dry or sensitive skin, especially if used in high concentrations.
Requires double cleansing
Because it's water-resistant, products containing Polyurethane-72 often need an oil-based cleanser or micellar water for thorough removal.
Best for
- People who want long-wearing, waterproof makeup
- Those with normal to oily skin looking for smudge-proof products
- Anyone using setting sprays or long-wear foundations
Use caution if
- Individuals with very dry or sensitive skin who find film-formers uncomfortable
- Those who prefer minimal, easily removable makeup
Usage tips
Safety summary
Polyurethane-72 is considered safe for use in cosmetics. It has a low irritation and comedogenic risk. Some individuals with very sensitive skin may experience a slight tightness or dryness. It is not known to be toxic or allergenic at typical use levels.
Research notes
Polyurethane-72 is a well-established film-forming polymer in cosmetics. Safety assessments by industry panels and regulatory bodies support its use. Research focuses on improving its flexibility and compatibility with other ingredients, but no significant safety concerns have emerged.
Common label clues
- Typical concentration
- 1% to 10%
- Regulatory status
- Approved for use in cosmetics in the US (FDA), EU (CosIng), and other major markets. It is not a restricted ingredient and is considered safe at typical use concentrations.
- Common uses
- Long-wear foundations, Waterproof mascaras, Setting sprays, Hair styling gels
- Environmental note
- As a synthetic polymer, Polyurethane-72 is not biodegradable. However, it is used in small amounts and is not known to bioaccumulate. Some brands are exploring bio-based polyurethanes as a more sustainable alternative.
Good to know
- Polyurethane-72 is considered a modern alternative to older film-formers like acrylates copolymers, offering better flexibility.
- It is often used in 'clean' or 'conscious' beauty brands as a synthetic but non-toxic option for long-wear formulas.
Common questions
What is Polyurethane-72 in beauty products?
Polyurethane-72 is a synthetic ingredient that creates a thin, flexible, invisible film on your skin or hair. Think of it like a clear, breathable raincoat for your makeup or hairstyle. It helps products stay put longer, resist water and sweat, and feel more comfortable than older stiff film-formers. You'll find it in long-wear foundations, waterproof mascaras, setting sprays, and hair gels.
What does Polyurethane-72 do in a beauty product?
When applied, the water or solvent in the product evaporates, leaving behind a thin, continuous layer of Polyurethane-72. This film adheres to the skin or hair, creating a physical barrier that locks in pigments and other ingredients, making them resistant to water, sweat, and friction. Its flexibility allows the film to move with your skin or hair without cracking or flaking.
Is Polyurethane-72 safe for most people?
Polyurethane-72 is considered safe for use in cosmetics. It has a low irritation and comedogenic risk. Some individuals with very sensitive skin may experience a slight tightness or dryness. It is not known to be toxic or allergenic at typical use levels.
Who should be careful with Polyurethane-72?
Individuals with very dry or sensitive skin who find film-formers uncomfortable Those who prefer minimal, easily removable makeup
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.