Hydrogenated Polyisobutene



Hydrogenated Polyisobutene at a glance

  • Synthetic emollient that provides moisture retention
  • Acts as a lubricant on skin’s surface
  • Often used as a replacement for mineral oil or silicones in a formula
  • Deemed safe as used in cosmetics

Hydrogenated Polyisobutene description

Hydrogenated polyisobutene is a synthetic, relatively viscous emollient with research backing its ability to provide long-lasting moisture retention. It acts as a lubricant on skin’s surface, providing a soft, smooth feel. In some formulas, hydrogenated polyisobutene is used as a substitute for mineral oil or silicones because of its similar action to help maintain skin’s moisture barrier and improve the feel of skin care products. The independent Cosmetic Ingredient Review Board found hydrogenated polyisobutene is safe as used in cosmetics, where it is generally found in amounts of 4% or less.

Hydrogenated Polyisobutene references

  • https://thedermreview.com/hydrogenated-polyisobutene/
  • CosmeticsInfo.org, Accessed March 2021, ePublication
  • International Journal of Toxicology, September 2020, pages 59S-90S
  • International Journal of Cosmetic Science, February 2010, pages 81-82

Peer-reviewed, substantiated scientific research is used to assess ingredients in this dictionary. Regulations regarding constraints, permitted concentration levels and availability vary by country and region.

Ingredient ratings


Proven and supported by independent studies. Outstanding active ingredient for most skin types or concerns.


Necessary to improve a formula's texture, stability, or penetration.


Generally non-irritating but may have aesthetic, stability, or other issues that limit its usefulness.


There is a likelihood of irritation. Risk increases when combined with other problematic ingredients.


May cause irritation, inflammation, dryness, etc. May offer benefit in some capability but overall, proven to do more harm than good.


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Not rated

We have not yet rated this ingredient because we have not had a chance to review the research on it.