Corn Starch/Maltodextrin Crosspolymer

Corn Starch/Maltodextrin Crosspolymer is a synthetic film-forming agent derived from natural starches (corn) and maltodextrin, a carbohydrate polymer. The ingredient is chemically cross-linked to improve stability and performance in cosmetic formulations.In skincare, it functions primarily as a film former — meaning it creates a thin, continuous layer across the skin's surface. This layer can help smooth texture, provide a soft-focus effect, and offer a degree of protective barrier support. It's commonly used in primers, foundations, and finishing powders, though it also appears in serums a…

The crosspolymer works by depositing as a thin film on the skin's surface. When applied, it spreads across the stratum corneum (outermost layer) and hardens slightly, creating a smooth, continuous coating that can blur the appearance of pores and fine lines.This film also acts as a mild occlusive — it sits on top of the skin and can slow water evaporation, contributing to short-term hydration and a more polished finish. The effect is largely cosmetic and temporary, washing away with cleansing.

This ingredient is most effective when layered into formulations designed for visual refinement — such as primers or powder products. In serums or creams, it contributes to texture and feel rather than active benefit. Apply evenly to clean skin and allow a few moments for the film to set before applying subsequent products. It works well under makeup and can be reapplied throughout the day if needed.

Corn Starch/Maltodextrin Crosspolymer is generally well-tolerated and has a low sensitising potential. It is suitable for sensitive skin types. No significant cautions are associated with this ingredient at typical cosmetic concentrations.