Carlack Glass Finish is a polymer-based sealant that forms a hydrophobic (water-hating) barrier layer on automotive glass. It achieves this by laying down reactive compounds and additives that cure to form a fully transparent micro-film that repels rain, sleet and snow upon contact. As a result, rain drops and road spray simply bead up and roll off of treated surfaces, or are blown off by airflow when driving speeds rise above 30 mph. Moreover, this beading tends to pick up and carry away fresh dirt and grime, meaning that the sealed glass is partially self-cleaning. Carlack Glass Finish therefore significantly improves visibility and driving comfort in poor weather, and greatly reduces the need to use windscreen wipers. Furthermore, in the summer months bug splatter washes off far more easily, and in freezing conditions de-icing is more quickly achieved.