Polybutyl Methacrylate

AKA: PBMA, Poly(butyl methacrylate)

Synthetic

Occlusive

Not Clean

OriginDerived from butyl methacrylate, a synthetic ester compound in the methacrylate polymer family. Synthesized through free radical polymerization of butyl methacrylate monomers.

Homopolymer of butyl methacrylate

CAS #

9003-63-8

Form

Powder

Skin Types

●all-skin-types

Best For

General

Functions

Film Forming

Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.

Creates Protective Barrier

The paper trail

🔬Peer-reviewed1 paper →

⚖️Regulatory1 listing →

🛡️Safety-assessed1 review →

Counts, not a verdict. A listing isn't a study. The trail, you decide.

EWG

CIR

Safe as used

Pregnancy

—

Concentration Guide

CIR lists it as not reported to be in use.

CIR · report published 2018

Regulatory Status

USA✔ permitted

EU⚠ restricted

JAPAN⚠ restricted

CANADA⚠ restricted

Regulatory Agencies

EWG CIR FDA EU COSING Health Canada

Verified Jun 2026

Data: CosIng · EWG · CIR