Hydrogenated Butadiene/Isoprene/Styrene Copolymer
AKA “Hydrogenated Polymer
Ingredient
Ingredient Facts
Hydrogenated butadiene/isoprene/styrene copolymer
AKA: Hydrogenated Polymer
Ingredient · Film Forming · EWG: 4
Synthetic
Occlusive
Not Clean
Benzene, ethenyl-, polymer with 1,3-butadiene and 2-methyl-1,3-butadiene, hydrogenated, block
CAS #
132778-07-5
Form
Liquid
State
Solid
See origin →
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
Anti-Aging Benefits
Antioxidant Protection
Reduces Inflammation
Traditional Use
A synthetic polymer developed in the 20th century for cosmetic use. Designed as a film-forming and texturizing agent to improve the feel and wear of skincare and color cosmetics.
Skin Types
all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Jun 2026
Data: CosIng · EWG · CIR