Polybutene
AKA “Polybutylene, Butylene polymer
Synthetic
Ingredient Facts
Polybutene
AKA: Polybutylene, Butylene polymer
Synthetic · Emollient · EWG: 4
Synthetic
Emollient
Occlusive
Skin Conditioner
Synthetic
Clean
A lightweight texture enhancer that creates a smooth, comfortable feel without heaviness. Helps products glide on effortlessly and maintain their consistency.
CAS #
9003-28-5, 9003-29-6
Form
Powder
See origin →
Functions
Binding
Viscosity Controlling
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Occlusive
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Holds Formula Together
Controls Viscosity
Antioxidant Protection
Reduces Inflammation
Wound Healing
Holds ingredients together
Controls product thickness
Traditional Use
A synthetic hydrocarbon polymer developed in the mid-20th century. Adopted by the cosmetics industry as an emollient and film-forming agent in skincare and cosmetic formulations.
Skin Types
all-skin-types
Best For
Dryness
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: CosIng · EWG · CIR