Polyquaternium-11 is widely used in the cosmetics and personal care industry due to its conditioning and film-forming properties. It is commonly found in hair care products such as shampoos, conditioners, and styling formulations, where it helps to improve hair texture, reduce static, and enhance manageability. The chemical acts as a conditioning agent by depositing a thin film on the hair surface, which helps to smooth the cuticle and retain moisture. Additionally, it provides a soft, silky feel to the hair, making it easier to comb and style. In skincare products, Polyquaternium-11 is used to improve the feel and texture of creams and lotions, offering a smooth and non-greasy finish. Its film-forming ability also helps to create a protective barrier on the skin, locking in hydration and enhancing the product’s overall performance.