Hydrogenated Polyisobutene

Benefits
Moisturizing

What is Hydrogenated Polyisobutene?

Hydrogenated Polyisobutene is a synthetic hydrocarbon polymer produced by polymerizing isobutene monomers and then hydrogenating the resulting polyisobutene for enhanced stability and purity. This clear, odorless, non-polar liquid belongs to the category of emollients and conditioning agents commonly found in lip products, creams, lotions, and hair care formulations. In products, it functions by spreading evenly on the skin to create a lightweight, non-greasy film that mimics natural sebum, facilitating smooth application and enhancing sensory qualities like slip and spreadability. As a viscosity controller, it modifies the flow properties to ensure product stability and user-friendly texture without altering the formula's overall performance.

Comedogenic Rating 1/5 Low risk of clogging pores
EWG Safety Rating 1 View on EWG →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Emollient
Softens and smooths skin by filling in surface roughness and improving slip; can also help reduce moisture loss when paired with occlusives and film formers.
Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.
Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.

Benefits

Provides a softening effect by smoothing surface irregularities on skin.

Helps minimize moisture evaporation when combined with other barrier ingredients.

Improves product consistency for better application and feel.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
Individuals with dry or rough skin seeking smoother texture.
People with rare sensitivities to synthetic polymers.
Users of lip and cream products desiring non-sticky hydration.
Those strictly avoiding petroleum-derived ingredients.
Those preferring lightweight emollients in daily formulations.
Individuals preferring only plant-based emollients.

Safety Notes

  • Rated low hazard by safety assessments for cosmetic use.
  • Low potential for pore-clogging based on established ratings.

Frequently Asked Questions about Hydrogenated Polyisobutene

What does Hydrogenated Polyisobutene do in skincare?

It acts as an emollient to soften skin, controls viscosity for better texture, and aids in moisture retention.

Is it safe for sensitive skin?

It has a low irritation potential and is deemed safe by cosmetic safety experts.

Does it cause acne?

It has a low comedogenic rating, making it unlikely to clog pores.