Researched by Helena DeMaria-Williams
Formula IngredientEmollientHydrogenated Polyisobutene
INCI: Hydrogenated Polyisobutene
Hydrogenated polyisobutene is a synthetic liquid oil derived from the hydrogenation of polyisobutene, a polymer of isobutylene. It functions as an emollient and viscosity-controlling agent, forming a lightweight, non-greasy film on the skin that softens and smooths without the heaviness of mineral oil. Available in a range of molecular weights, it can be tuned from a volatile, light-feel oil to a richer, more occlusive texture depending on formulation needs.
Category
Emollient
Irritation Risk
Low
Skin Types
dry, normal, combination, sensitive, acne-prone, mature
What does this do in a formula?
skin softening, smoothing texture, moisturisation, waterproofing, shine enhancement (lip products), film-forming
Is Hydrogenated Polyisobutene safe? Key considerations
Can Hydrogenated Polyisobutene cause irritation?
Low RiskIrritancy rating of 2/10 (INCIDecoder). Well-tolerated by most skin types; no known EU Annex restrictions. Non-reactive and non-sensitising in typical cosmetic concentrations.
Does Hydrogenated Polyisobutene increase sun sensitivity?
No RiskHydrogenated polyisobutene is a chemically inert emollient with no photosensitising properties. No SPF precautions required.
Is Hydrogenated Polyisobutene safe during pregnancy?
SafeNo reproductive or developmental toxicity concerns have been identified in available literature. As a high-molecular-weight polymer with minimal dermal absorption, it is generally considered safe for use during pregnancy. No flagging from EWG or MotherToBaby for this ingredient class.
How does Hydrogenated Polyisobutene work?
Hydrogenated polyisobutene is a synthetic liquid oil derived from the hydrogenation of polyisobutene, a polymer of isobutylene. It functions as an emollient and viscosity-controlling agent, forming a lightweight, non-greasy film on the skin that softens and smooths without the heaviness of mineral oil. Available in a range of molecular weights, it can be tuned from a volatile, light-feel oil to a richer, more occlusive texture depending on formulation needs.
Individuals with MANUAL REVIEW: No well-evidenced contraindications; those with severe congestion-prone skin may prefer to patch test heavier formulations. should review the considerations above before use.
Which products contain Hydrogenated Polyisobutene?
Shop products that contain Hydrogenated Polyisobutene
