Researched by Helena DeMaria-Williams
Formula IngredientFilm Forming, Viscosity Controlling, EmollientPolyisobutene
INCI: Polyisobutene
Polyisobutene is a synthetic polymer of isobutylene (2-methyl-1-propene). It functions as a film-forming agent, viscosity controller, and binding agent in cosmetic formulations. It enhances gloss in lip cosmetics, increases product adhesion and wear longevity, and when combined with emulsifiers creates effective thickening systems. It also provides emollient and moisturising properties.
Category
Film Forming, Viscosity Controlling, Emollient
Irritation Risk
Low
Skin Types
all skin types
What does this do in a formula?
film forming, gloss enhancement, product adhesion, viscosity control, moisturising, binding, texture improvement
Is Polyisobutene safe? Key considerations
Can Polyisobutene cause irritation?
Low RiskPolyisobutene is well tolerated. EWG rates it as safe with a hazard score of 1 (lowest). No EU CosIng Annex II or III restrictions apply. It is a non-reactive polymer with minimal sensitisation potential.
Does Polyisobutene increase sun sensitivity?
No RiskPolyisobutene does not increase photosensitivity. No sun protection precautions are required.
Is Polyisobutene safe during pregnancy?
SafeA synthetic polymer with no known reproductive or developmental toxicity. Considered safe for topical use during pregnancy at cosmetic concentrations.
How does Polyisobutene work?
Polyisobutene is a synthetic polymer of isobutylene (2-methyl-1-propene). It functions as a film-forming agent, viscosity controller, and binding agent in cosmetic formulations. It enhances gloss in lip cosmetics, increases product adhesion and wear longevity, and when combined with emulsifiers creates effective thickening systems. It also provides emollient and moisturising properties.
Which products contain Polyisobutene?
Shop products that contain Polyisobutene
Bio-Active Ceramide Moisturiser
Hydrocolloid Invisible Pimple Patches
Hydrocolloid Invisible Pimple Patches
