Hydrogenated Butadiene/Isoprene/Styrene Copolymer
AKA “Hydrogenated Polymer
Synthetic
Ingredient Facts
Hydrogenated butadiene/isoprene/styrene copolymer
AKA: Hydrogenated Polymer
Synthetic · Film Forming · EWG: 4
Synthetic
Occlusive
Skin Conditioner
Synthetic
Clean
Creates a smooth, flexible layer on skin or hair to lock in moisture and improve product texture. Helps formulas glide on effortlessly while maintaining a comfortable feel.
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.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
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
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Insufficient
Pregnancy
Yes
CIR Safety Findings
medical-approval
all-shades-safe
Regulatory Status
USAunder review
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: CosIng · EWG · CIR