Over time, silicone can also build up on your hair, resulting in a dry feel and dull appearance. You may even notice that your hair becomes weaker and more prone to breakage. And if you're using a form of silicone that isn't water-soluble, it can be really hard to remove it with a regular wash creating a plastic coating.
dimethicone, cetyl dimethicone, cetearyl methicone, dimethiconol, stearyl dimethicone, cyclomethicone, amodimethicone, trimethylsilylamodimethicone, and cyclopentasiloxane) are the ones that are not water-soluble