Ingredient review

Polyurethane-64

INCI: POLYURETHANE-64

A synthetic film-former that helps makeup and skincare last longer and feel smoother, with a good safety profile for most skin types.

beautyskincarefilm-former

In plain English

Polyurethane-64 is a man-made polymer that creates a flexible, invisible film on your skin. Think of it like a very thin, breathable plastic wrap that helps your makeup stay put and resist water, sweat, or smudging. It also makes products feel silky and spread easily without being sticky.

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

Polyurethane-64 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 Polyurethane-64.
  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

A synthetic polymer belonging to the polyurethane family, designed specifically for cosmetic use as a film-forming agent.

How it works

When applied, the polymer molecules link together to form a continuous, flexible film on the skin or hair. This film locks in pigments and other ingredients, improves water resistance, and gives a smooth, even finish. It also helps reduce transfer (like foundation rubbing off on clothes).

Pros

Long-lasting wear

Helps makeup stay put for hours without fading or smudging, even in humid conditions.

Smooth texture

Gives products a silky, non-greasy feel that glides on easily and dries down comfortably.

Cons and cautions

Synthetic origin

Not biodegradable or plant-derived, which may be a concern for those seeking natural or eco-friendly options.

Potential tightness

On very dry or compromised skin, the film can feel slightly tight or emphasize dry patches.

Best for

  • Anyone wanting long-wearing, transfer-resistant makeup
  • People with oily or combination skin who need extra staying power

Use caution if

  • Those who prefer exclusively natural or plant-based ingredients

Usage tips

Apply over well-moisturized skin to avoid any tight feeling from the film.
Use a gentle oil-based cleanser or micellar water to fully remove products containing polyurethane-64 at the end of the day.

Safety summary

Polyurethane-64 is considered safe for cosmetic use at typical concentrations. It has low irritation and comedogenic potential, making it suitable for most skin types. However, those with very sensitive or dry skin may notice a slight tightening sensation.

Research notes

While specific studies on Polyurethane-64 are limited, the broader class of cosmetic polyurethanes has been reviewed by safety panels and found to be non-irritating and non-sensitizing. Evidence supports its function as an effective film-former with good skin compatibility.

Common label clues

Typical concentration
1–10%
Regulatory status
Approved for use in cosmetics in the US, EU, and many other regions. The Cosmetic Ingredient Review (CIR) panel has evaluated similar polyurethane polymers and found them safe as used.
Common uses
Long-wear foundations, Waterproof mascaras, Lip products, Sunscreens
Environmental note
As a synthetic polymer, polyurethane-64 is not biodegradable. Its environmental impact depends on formulation and disposal, but it is not known to bioaccumulate significantly.

Good to know

  • Polyurethane-64 is part of a larger family of polyurethane polymers used in cosmetics, each with slightly different properties.
  • It is often combined with other film-formers or silicones for optimal texture and performance.

Common questions

What is Polyurethane-64 in beauty products?

Polyurethane-64 is a man-made polymer that creates a flexible, invisible film on your skin. Think of it like a very thin, breathable plastic wrap that helps your makeup stay put and resist water, sweat, or smudging. It also makes products feel silky and spread easily without being sticky.

What does Polyurethane-64 do in a beauty product?

When applied, the polymer molecules link together to form a continuous, flexible film on the skin or hair. This film locks in pigments and other ingredients, improves water resistance, and gives a smooth, even finish. It also helps reduce transfer (like foundation rubbing off on clothes).

Is Polyurethane-64 safe for most people?

Polyurethane-64 is considered safe for cosmetic use at typical concentrations. It has low irritation and comedogenic potential, making it suitable for most skin types. However, those with very sensitive or dry skin may notice a slight tightening sensation.

Who should be careful with Polyurethane-64?

Those who prefer exclusively natural or plant-based ingredients

Research sources

Cosmetic Ingredient Review – Polyurethane PolymersOpenEuropean Chemicals Agency – Polyurethane-64OpenPubMed – Safety of Polyurethane in CosmeticsOpen

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.