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Film Former

POLYESTER-4

Updated
65

Safety score · 0–100

Fine

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

About

A generic polyester-based film former (the -4 designates a numbered INCI variant). Used for wear and finish. Cured polymer is inert; concerns center on residual monomers from the supplier.

Function

FILM FORMINGSKIN CONDITIONING

Skin benefits

  • Film-forming polyester
  • Improves wear of color cosmetics
  • Stable polymer backbone

Known concerns

  • Mystery polymer with limited public data
  • Residual monomers depend on supplier
  • Possible film-build with repeated leave-on use

References

EU

EU CosIng database

European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.

Related film formers

65
ACACIA FARNESIANA GUM
Film Former
 65
ACRYLAMIDES/DMAPA ACRYLATES/METHOXY PEG METHACRYLATE COPOLYMER
Film Former
 65
ACRYLAMIDOMETHYL CELLULOSE ACETATE BUTYRATE
Film Former
 65
ACRYLATES/ETHYLHEXYL ACRYLATE/GLYCIDYL METHACRYLATE CROSSPOLYMER
Film Former
 65
ACRYLIC ACID/ETHYLTRIMONIUM CHLORIDE METHACRYLATE COPOLYMER
Film Former
 65
ACRYLONITRILE/GLYCOL DIMETHACRYLATE CROSSPOLYMER
Film Former
 65
BIS-ARACHIDYL PEG-400/SMDI COPOLYMER
Film Former
 65
BIS-BENZYL BUTYLENE GLYCOL/DILINOLEIC ACID/IPDI COPOLYMER
Film Former

Check your shelf

Find POLYESTER-4 in your products.

Scan any cosmetic product with LuxSense to see if it contains POLYESTER-4 and get a full ingredient breakdown with safety scores.

This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.