I've got to believe that rainex is cheaper and easier to apply (by the end user with no special tools)
RainX is definitely cheaper and easier to apply to end user. But nano technology is leaps and bounds superior to traditional sealants such as RainX. For one, the glass surface is first polished to remove embedded contamination. With products like RainX, you're simply spraying the product on, allowing it to make a bond, then wiping off. The glass surface itself is never truly clean. Nano technology is manipulating surfaces on an atomic scale...unmatched by any other technology.
So as always, there are many things in life that "get the job done"...such as an ICE car to get you from point a to point b...but then you have technology come along and give performance and innovation taking us to the next generations...hence Tesla.
That's what nano technology has done for our industry. This thread is simply to show how far we've come in advancement when it relates to protecting your vehicle.
- - - Updated - - -
Save your money and get RainX.
Also, applying any coating to your windshield will have a negative impact on the performance of your windshield wipers.
Due to the nano particles filling in the small pores of the glass surface, you've actually reduced drag, therefore, extending wiper blade life. If water can bead off not leaving any trace, it's a clear indication of little to no surface tension.
- - - Updated - - -
+1
I tired this stuff a few years ago and it was awful. Wipers skipped like a little girl on recess.
As far as I know, this current product is not on the market yet. It's from Germany and we've been using and testing it for about three years...it's been around for almost 15-20 years in europe.
As with nano products, the skill of the installer and the correct surface preparation and application are the key to performance of the nano coating.
Do you know the specific product that was used on your windshield? Was it applied by a pro or a DIY product?
- - - Updated - - -
Regular old car wax on glass works, too, but may not be as durable and long lasting.
Depending on the wax used, and its melting point, it's not recommended to use it on glass. For example, carnauba waxes have a melting point of around 180 degrees. So on a really hot day, you may come close to that and if you used your wiper blades, you'd smear the wax on windshield, which could be a rather dangerous, as it would haze the windshield, affecting visibility at day and night.