Back to Ingredient Dictionary

PEI-35

Description

PEI-35, or Polyethylenimine-35, is a synthetic polymer widely used in haircare formulations due to its multifaceted benefits. This cationic compound has a high molecular weight and exhibits excellent film-forming properties, making it an invaluable ingredient in various hair styling and treatment products.

PEI-35 functions as a conditioning agent, providing a smooth, silky feel to hair strands while reducing static and enhancing manageability. Its positive charge allows it to adhere effectively to the negatively charged hair surface, creating a protective barrier that helps to seal the cuticle and lock in moisture.

In hair styling products, PEI-35 acts as a holding agent, offering long-lasting style retention without excessive stiffness. It also contributes to increased volume and body, particularly beneficial for fine or limp hair. Additionally, this polymer aids in color retention for dyed hair by forming a protective film around the hair shaft.

PEI-35 is compatible with a wide range of other haircare ingredients, allowing for versatile formulations. While generally well-tolerated, it may cause irritation in individuals with sensitive scalps when used in high concentrations.