Dimethicone belongs to a group of polymeric organosilicon compounds that are commonly referred to as silicones. It is the most widely used silicon-based organic polymer, and is particularly known for its unusual rheological (or flow) properties. Its applications range from contact lenses and medical devices to elastomers; it is present, also, in shampoos (as dimethicone makes hair shiny and slippery), caulking, lubricating oils, and heat-resistant tiles.
Dimethicone renews the skin barrier layer , which must be renewed as the skin sloughs off. It also coats the surface of the hair and lubricates it, improving combing providing detangling, and thus reducing hair loss and breakage.