Ingredient review
PEG Crosspolymer Film Former
INCI: METHOXY PEG-17/METHOXY PEG-11/HDI CROSSPOLYMER
A synthetic film former that helps products stay put and resist water, but it offers no active skincare benefit.
In plain English
This ingredient is a type of plastic-like polymer that spreads into a thin, flexible film on your skin or hair. It helps makeup last longer, makes sunscreen more water-resistant, and gives hair products hold. It doesn't absorb into the skin—it sits on top and creates a protective layer.
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
PEG Crosspolymer 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 PEG Crosspolymer 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 synthetic crosspolymer made by linking polyethylene glycol (PEG) chains with hexamethylene diisocyanate (HDI). It is designed to form a flexible, water-resistant film on surfaces.
How it works
When applied, the polymer molecules spread out and link together as the solvent evaporates, forming a continuous, breathable film. This film helps other ingredients stay in place, resists water and sweat, and can improve the texture of a product.
Pros
Boosts wear time
Helps foundation and mascara stay put for hours, reducing the need for touch-ups.
Enhances water resistance
Makes sunscreens and waterproof makeup more effective during swimming or sweating.
Cons and cautions
No active benefit
It only forms a film—it doesn't hydrate, soothe, or treat the skin.
Removal can be tricky
Because it's water-resistant, you may need an oil-based cleanser or micellar water to fully remove it.
Best for
- People who want long-wearing makeup or water-resistant sunscreen
- Those with normal to oily skin who prefer a matte finish
Use caution if
- People who prefer lightweight, non-film-forming products
- Those with very dry or sensitive skin that may feel tight under a film
Usage tips
Safety summary
Generally recognized as safe for topical use in cosmetics. PEG compounds can contain trace impurities like ethylene oxide, but cosmetic-grade ingredients are purified to meet safety standards. The HDI component is fully reacted and not free in the final product.
Research notes
Limited peer-reviewed studies specific to this exact polymer, but the broader class of PEG-based crosspolymers has a long history of safe use in cosmetics. Safety assessments by the Cosmetic Ingredient Review (CIR) panel have concluded that similar PEG polymers are safe when formulated correctly.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions. The EU CosIng database lists it as a film former with no known restrictions at typical use levels.
- Common uses
- Sunscreens, Long-wear foundations, Waterproof mascaras, Hair styling products
- Environmental note
- As a synthetic polymer, it is not biodegradable and may contribute to microplastic pollution. Some manufacturers are exploring bio-based alternatives.
Good to know
- This ingredient is often found in 'long-wear' or '24-hour' makeup formulas.
- It is considered safe for use in cosmetics by major regulatory bodies at typical concentrations.
Common questions
What is PEG Crosspolymer Film Former in beauty products?
This ingredient is a type of plastic-like polymer that spreads into a thin, flexible film on your skin or hair. It helps makeup last longer, makes sunscreen more water-resistant, and gives hair products hold. It doesn't absorb into the skin—it sits on top and creates a protective layer.
What does PEG Crosspolymer Film Former do in a beauty product?
When applied, the polymer molecules spread out and link together as the solvent evaporates, forming a continuous, breathable film. This film helps other ingredients stay in place, resists water and sweat, and can improve the texture of a product.
Is PEG Crosspolymer Film Former safe for most people?
Generally recognized as safe for topical use in cosmetics. PEG compounds can contain trace impurities like ethylene oxide, but cosmetic-grade ingredients are purified to meet safety standards. The HDI component is fully reacted and not free in the final product.
Who should be careful with PEG Crosspolymer Film Former?
People who prefer lightweight, non-film-forming products Those with very dry or sensitive skin that may feel tight under a film
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.