Polyisobutyl Methacrylate
AKA “PIBM, poly(isobutyl methacrylate)”
Synthetic
Ingredient Facts
Polyisobutyl methacrylate
AKA: PIBM, Poly(isobutyl methacrylate)
Synthetic · Emollient · EWG: 4
Synthetic
Emollient
Occlusive
Skin Conditioner
Synthetic
Clean
A lightweight polymer that creates a smooth, flexible coating on skin or hair, helping products adhere better and last longer without feeling heavy.
CAS #
9011-15-8
Form
Powder
See origin →
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Viscosity Controlling
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Smoothing
Creates Protective Barrier
Traditional Use
A synthetic acrylic polymer developed in the 20th century cosmetics industry. Created to provide film-forming and conditioning properties as an alternative to natural gums and resins.
Skin Types
●all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
Verified Feb 2026
Data: CosIng · EWG · CIR