Polyisobutene is a lightweight synthetic polymer used to build texture, cushion, and a soft-focus finish in modern formulas. It provides flexible adhesion that helps pigments and layers hug the skin comfortably, boosting glide and wear without a tacky feel. You’ll often find it in balms, glosses, and water-resistant formats—ideal for anyone seeking smoother application and a stay-put, move-with-you finish.
