RainX 2 in 1 Glass Cleaner Review – Too Potent For Use?

RainX 2 in 1 Glass Cleaner scores 75 out of 100

Product Introduction:

RainX 2 in 1 Glass Cleaner is a multi-function glass cleaner. It states that it can clean automotive glass as well as apply a water-repellant film on the windows. But does this multi-function cleaner actually work? Let’s find out!

Disclosure: We bought this product with our own money.

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Offering (5/10, 50%)

RainX 2 in 1 Glass Cleaner comes in a really nice package. One thing RainX always gets right is their packaging; you can pick out this yellow bottle from across the store. We bought our bottle for $8.99 which is on par with most of the competition. Our bottle was a decent size. It contained 680mL (23oz) of product. This gives it a value ratio of 75.6mL/$ (2.56oz/$) which is good. We also believe that this product provides more value than regular glass cleaners because it is a multi-function cleaner – It’ll clean your glass and also apply hydrophobic film to the glass to help bead up water and fling it off the window.

This product is the only glass cleaner we tested that is flammable. This was really surprising to us. On the back of the bottle, the labels states that it contains acetone. Due to the acetone, we would not recommend using this on the interior glass for fear of damaging leather and other surfaces. It also states that it is not meant for use on tinted windows. This product also had an extremely chemically smell which was not pleasant to use.  

Technical (26/30, 87%)

Experimental Design

We used our Glass Cleaning test methodology (GA-D-GC-A1) which involved using a piece of glass that is cleaned with alcohol. In this case, the glass was at ambient temperature (9*C, 48*F). We divided it into 4 quadrants since we were comparing RainX 2 in 1 Glass Cleaner against various other competitors. You can watch our full comparison video on YouTube.

We used fingerprints, motor oil, and jam (to mimic tree sap and berries) because we believe that these might be common contaminants on your windows. To test, we would spray once on the glass and contaminants, wait 30 seconds, and the wipe off with a blue shop towel. As necessary, we would repeat until clean and we also would buff with a microfiber at the end.


Fingerprints: RainX worked like a charm. All the fingerprints were removed with one spray.

Motor oil: While this is a torture test, this product struggled. The first spray and wipe left some oil and haze on the glass. We believe the acetone helped a little here. The second spray and wipe left the glass perfectly clear.

Jam: The first spray removed the all the stickiness from the surface of the glass. It was relatively easy to collect it all. There was a significant amount of haze on the glass. The second spray removed everything leaving a perfect finish.

Overall, the RainX did well in the lab test.

Real World Testing (38/50, 76%)

Our experience using the product

For the real-world test, we used RainX on the panoramic glass roof our Mercedes SL600. There was quite a lot of dust on it from sitting in the garage over the winter. The roof’s glass was at 9*C (48*F).


The product performed well. We used one spray on the panel. Using a microfibre cloth, we wiped the surface removing all of the dust in one go. It left a very clean finish on the roof. While using it, we were more cautious with the overspray. We didn’t want to ruin trim, paint, or the rubber seals on our car. This was the only product that we had to be cautious with, and as such we deducted points from this test.  

This product explicitly stated that it helps to bead water. It did a decent job of beading the water, but it was difficult to distinguish it from its competitors. It did not bead as well as a wax or sealant would.

Overall,  RainX 2 in 1 Glass Cleaner performed very well, but it’s harsh composition left us worrying about damaging other things on our car.  

Performance vs. Claims (6/10, 60%)

Product Claim 1

Streak-free , removes bug residue and road film.


This product worked well to remove general dirt from the glass very well. The acetone in the solution really helped to cut through oil, but it struggled more than expected with our jam test.  

Product Claim 2

Repels water and beads up.


While clean glass typically sheets off water well, it did help to improve beading performance but at the expense of general usability.

Product Claim 3

Prevents snow/ice/bugs from sticking


We didn’t seem to notice this in our testing. Even with the RainX previously sprayed on the our test glass, we did not notice an improvement in performance when it comes to cleaning up dirt, oils, and other contaminants.


In conclusion, we believe that RainX 2 in 1 Glass Cleaner is a quality product that cleans glass well and provides an extra layer of water-repellant. However, the formula is quite aggressive and we had to be cautious when using it. We don’t feel safe using it in the interior of our car, and it also states not to use it on tinted windows. Those two factors really diminishes the usability of the product. It also doesn’t provide as good of a water-repellant as a wax or sealant or even regular RainX water repellant.