There has been lots of comparison between RainX and Aquapel, because they are both made to serve the same purpose – windshield rain repellents. But they work in completely different ways, with different types of chemicals.
RainX and similar products are silicone based materials that make a filmy layer on the windshield causing the water to roll off , similar to the effect of rinsing greasy hands. But eventually it wears down and degrades. The film left behind can affect the clarity of the windshield, as well as build up on the wipers and moldings, especially if you also use the RainX wiper fluid. Continue reading