Rain-X and similar spray and wipe-on products use fine silicone polymers; which, as the name suggests, have a molecular backbone of silicon — not the carbon chains found in plastics, waxes ...

Rain-X is a perfectly good brand ... and won't leave any unpleasant streaks behind when you wipe it. The initial spray loosens and removes debris and dirt, and the protective layer left behind ...

After briefly considering rubbing a potato on the windshield as prescribed by the old wives’ tale, we were quite grateful for the invention of Rain-X — a ... mixture in a spray bottle.

A water-repellent spray applied to the outside of the visor can help whatever moisture there is around — actual rain or spray — be dispersed and give you a clear view of the road ahead.