Function: skin conditioning - emollient, skin protecting, anti-foaming
Dimethicone is a form of silicone used to give products lubricity, spreadability, slip and good feel. It can also be used as a defoamer or help reduce the greasy feeling of products. In sunscreens, it can be a good waterproofing material.
Research suggests that dimethicone can help protect the skin from moisture loss.