PEG-8/Smdi Copolymer

What PEG-8/Smdi Copolymer is & what it does

PEG-8 is a polyethylene glycol, a water-soluble ingredient that acts as an emulsifier, solvent and humectant in a formula. It helps blend oil and water, dissolves other ingredients so they spread evenly, and draws in a little moisture, giving sunscreens a smoother, more uniform feel. It works in the formula rather than on the skin, and is used in small amounts.