Manufacturers of Detailing related products
The refractive index is a way of measuring how lights behaves through a certain medium. This number gives an indication of how light reacts and how light is reflected. Manufacturers use (among other things) this as an indication of how light is reflected by a protective product and how that will make the surface look.
Silicones are a group of polymers that are man-made and do not occur in nature. Within the world of detailing, polydimethylsiloxane is a very popular one. Silicones, just like polymers, have certain properties that can help a product perform better in a certain way. When a polymer contain any form of siloxane, it is a silicone.