Back to Ingredient Dictionary

POLYURETHANE-4

Description

Polyurethane-4 is a synthetic polymer widely used in cosmetic and skincare formulations. This versatile ingredient functions primarily as a film-forming agent, creating a protective barrier on the skin or hair surface. Its unique chemical structure allows it to form a flexible, breathable film that helps lock in moisture and protect against environmental stressors.

In skincare products, Polyurethane-4 enhances the texture and feel of formulations, contributing to a smooth, non-greasy application. It is particularly effective in long-wearing makeup products, such as foundations and mascaras, where it improves adherence and water resistance. The film-forming properties also make it valuable in sunscreens, helping to maintain the integrity of UV filters on the skin.

Polyurethane-4 is generally well-tolerated by most skin types and is considered safe for use in cosmetics. It is non-comedogenic, meaning it doesn't clog pores, making it suitable for acne-prone skin. The ingredient's ability to form a protective barrier without heavy occlusion makes it beneficial in products designed to shield the skin from pollution and other environmental aggressors. Its compatibility with various other cosmetic ingredients allows for versatile formulation options in a wide range of skincare and makeup products.