If your commute is mostly spent crawling along in heavy traffic in an urban setting, then Nanolex Urban Glass Sealant is the glass coating for you. Like most glass coatings, it works by laying down a film of functional ingredients (including, in this case, a high-tech composite material) that hardens to form a fully transparent hydrophobic (water-hating) barrier layer that repels rain, sleet and snow upon contact. However, what makes it special is that its runoff threshold is just 20 mph, which is significantly lower than that of its rivals. As a result, visibility and driving comfort in slow moving traffic is greatly improved, even during extremely wet weather. This is a godsend in poor conditions, when you need to keep an extra careful eye out for pedestrians, cyclists and motorcyclists, who become much harder to spot. Providing that the treated surfaces are properly prepared in advance, each application of Nanolex Urban Glass Sealant will last for between three to six months before needing to be reapplied.