Ingredient review
Polyurethane-65
INCI: Polyurethane-65
Polyurethane-65 is a safe, synthetic film-former that helps makeup and sunscreen stay put without feeling heavy or sticky.
In plain English
Polyurethane-65 is a plastic-like polymer that forms a thin, flexible film on your skin or hair. Think of it like a clear, breathable raincoat — it helps products resist water, sweat, and smudging while still letting your skin move naturally. It's commonly used in long-wear makeup and sunscreens to improve durability.
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-65 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-65.
- 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-65 is a synthetic polymer belonging to the polyurethane family. It is created by reacting diisocyanates with polyols, resulting in a flexible, film-forming material that is widely used in cosmetics for its water-resistant and adhesive properties.
How it works
When applied, Polyurethane-65 forms a continuous, flexible film on the skin or hair surface. This film acts as a barrier that resists water and oil, helping other ingredients (like pigments or UV filters) stay in place longer. It also adds a slight thickening effect to formulas, improving texture and spreadability.
Pros
Long-lasting wear
Helps makeup and sunscreen resist smudging, fading, and water exposure, so you need fewer touch-ups.
Comfortable feel
Unlike some older film-formers, Polyurethane-65 creates a flexible film that moves with your skin, reducing stiffness or tightness.
Cons and cautions
Removal difficulty
Because it forms a water-resistant film, you may need an oil-based or dual-phase cleanser to fully remove products containing it.
Synthetic origin
As a synthetic polymer, it may not be suitable for those seeking 100% natural or biodegradable formulations.
Best for
- Anyone wanting long-lasting, transfer-resistant makeup
- People who need water-resistant sunscreen for outdoor activities
Use caution if
- Those who prefer exclusively natural or biodegradable ingredients
Usage tips
Safety summary
Polyurethane-65 is considered safe for cosmetic use with low irritation and comedogenic potential. It is well-tolerated by most skin types, though those with very sensitive skin should patch-test new products.
Research notes
Polyurethane polymers have been reviewed by the Cosmetic Ingredient Review (CIR) panel and deemed safe for use in cosmetics. Individual studies on Polyurethane-65 are limited, but the class of polyurethane film-formers is well-established in dermatological safety.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and many other regions. The Cosmetic Ingredient Review (CIR) panel has evaluated polyurethane polymers and found them safe for topical use at typical concentrations.
- Common uses
- Long-wear foundations, Waterproof mascaras, Sunscreens, Hair styling products
- Environmental note
- Polyurethane-65 is a synthetic polymer and may not be biodegradable. Its environmental impact is not fully studied, but it is not known to bioaccumulate significantly.
Good to know
- Polyurethane-65 is considered non-comedogenic and generally safe for most skin types.
- It is often used in combination with other film-formers for enhanced durability.
Common questions
What is Polyurethane-65 in beauty products?
Polyurethane-65 is a plastic-like polymer that forms a thin, flexible film on your skin or hair. Think of it like a clear, breathable raincoat — it helps products resist water, sweat, and smudging while still letting your skin move naturally. It's commonly used in long-wear makeup and sunscreens to improve durability.
What does Polyurethane-65 do in a beauty product?
When applied, Polyurethane-65 forms a continuous, flexible film on the skin or hair surface. This film acts as a barrier that resists water and oil, helping other ingredients (like pigments or UV filters) stay in place longer. It also adds a slight thickening effect to formulas, improving texture and spreadability.
Is Polyurethane-65 safe for most people?
Polyurethane-65 is considered safe for cosmetic use with low irritation and comedogenic potential. It is well-tolerated by most skin types, though those with very sensitive skin should patch-test new products.
Who should be careful with Polyurethane-65?
Those who prefer exclusively natural or biodegradable ingredients
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.