What it is
This ingredient is the natural polysaccharide pullulan grafted with silicone (siloxane) groups through a carbamoyl linkage. The pullulan backbone forms a flexible film that can give a temporary tightening, smoothing feel, while the silicone modification improves spreadability and water compatibility on the skin surface. It is used in tone-up and finishing sunscreens to refine the appearance of the skin surface.
Safety & warnings
Pullulan-based film formers, including silicone-modified versions, are generally well tolerated and low in irritation potential. It is not a recognized fragrance allergen.
Origin & sourcing
Semi-synthetic. The pullulan backbone is a polysaccharide produced by fermentation of the fungus Aureobasidium pullulans, then chemically modified with silicone groups.
Questions everyone asks
What is pullulan?
Pullulan is a natural polysaccharide made by fermentation; here it is modified with silicone groups to act as a flexible cosmetic film former.
What effect does it give on skin?
Its film can create a temporary tightening and smoothing feel, helping refine the look of the skin surface in finishing products.