What it is
HDI/Trimethylol hexyllactone crosspolymer is a spherical, crosslinked polymer typically supplied as a fine powder. In sunscreens and makeup it improves slip and skin feel, helps blur the look of the skin surface, and can absorb excess oil for a soft, smooth, more matte finish. It functions as a sensory and texturizing additive rather than a treatment ingredient.
Safety & warnings
This crosslinked polymer powder is inert and generally well tolerated on skin. It is not a recognized fragrance allergen.
Origin & sourcing
It is a fully synthetic crosslinked polymer.
Questions everyone asks
What does this polymer do in a sunscreen?
It is a powder additive that improves the product's slip and feel, helps blur the skin's surface, and can absorb oil for a softer, smoother, less shiny finish.
Is it an active or treatment ingredient?
No. It is a sensory and texturizing polymer that affects how the product applies and looks, not a skin-treatment or UV-protective ingredient.