PEG-12 Dimethicone Bon Émollient Hydratation PEG-12 Dimethicone at a glance Blend of skin-protective dimethicone + a lightweight polyethylene glycol Functions as a hair/skin-conditioning agent Also helps improve the texture and perceived finish of skin care formulas Deemed a safe cosmetic ingredient PEG-12 Dimethicone description PEG-12 dimethicone is a silicone blend of skin-protective dimethicone and a lightweight polyethylene glycol. It functions as a hair/skin-conditioning agent. It can also help improve the overall texture and finish of skin care formulas. In its raw material form, PEG-12 dimethicone comes as a clear liquid that ranges from colourless to yellow in appearance. In a 2015 report, the Cosmetic Ingredient Review Expert Panel deemed PEG-12 dimethicone as safe in cosmetic use. Their report looked at 538 products using PEG-12 dimethicone up to a maximum concentration of 6.5%.