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Polybutyl Acrylate
AKA “PBA, Poly(butyl acrylate)”
Ingredient
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Ingredient Facts
Polybutyl acrylate
AKA: PBA, Poly(butyl acrylate)
Ingredient · Film Forming · EWG: 4
Synthetic
Occlusive
Not Clean
Poly[1-(butoxycarbonyl)ethylene]
CAS #
9003-49-0
Form
Powder
See origin →
Functions
Binding
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Holds Formula Together
Creates Protective Barrier
Creates protective layer
Holds ingredients together
Traditional Use
A synthetic polymer created for cosmetic use as a film-forming and binding agent, developed through modern polymer chemistry without traditional origins.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: CosIng · EWG · CIR