Rain X on the Inside of Car Windows: An Effective Solution?

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Driving in the rain can cause severe visibility issues that many people struggle with. Rain X is a great solution to make driving in the rain safer and more visible. You might think it’s a good idea to use Rain X on inside and outside car windows, but this doesn’t always work correctly. 

Rain X causes rain to bead on a glass surface and protects from dirt and other debris. It should not be applied on the inside of car windows because it can cause a haze. To apply Rain X, you’ll want to use a small amount on a microfiber cloth and wipe in circular motions.

Knowing the proper way to use any product is important, and Rain X is no different. Rain X is a great tool to apply to the outside of your vehicle’s windshield, mirrors, and windows. So now, let’s learn more about Rain X and how to use it.

What is Rain X?

windshield wiper in action

Rain X is a vehicle glass treatment used on windows, windshields, and mirrors to make driving in the rain easier. It utilizes a water-resistant silicone polymer that makes the water on the glass bead and roll off the treated surface.


Using water beading technology and the natural airflow of a vehicle in motion, Rain X creates an invisible barrier between the glass surface and the rain. This allows the water to slide away easier than if it naturally hit the glass and splashed. 

Not only does Rain X make driving in rainy conditions easier, but it also stops bug splatters from sticking to your windshield.

On top of that, Rain X can be a cold weather treatment for your vehicle’s windows and mirrors to make them less likely to freeze over and prevent hard water stains and dirt from accumulating on each treated surface.

What is Rain X Made Out Of?

Rain X is made from a patented blend of hydrophobic silicones and polymers, which makes it a water-resistant product. It protects any surface it’s used on from dirt, salt, bugs, pollen, bird droppings, and anything else that might get kicked up from the road. 

Is Rain X Safe on the Inside of Car Windows?

While it is not strictly prohibited or dangerous to use Rain X on the inside of car windows, it is definitely recommended not to. Because Rain X is wax based, a substance that makes the water bead and repel from the surface, this can cause the interior windows and windshield to become hazy. 

Removing Rain X

If you have already attempted to use Rain X on the interior windows of your car, apply a small amount of dish soap and mix it with some water. Take a microfiber cloth and wipe in circular motions until the Rain X is completely removed. Alternatively, vinegar or Isopropyl alcohol can also be used to remove Rain X safely.

Will Rain X Damage Car Paint?

No, Rain X will not damage the paint on your car. However, if you wax your vehicle, it will strip the wax off. 

Some people have been known to apply Rain X to their entire car in the hopes that it will offer protection from dirt, salt, and other road debris. Unfortunately, despite their effort, it doesn’t last very long, and it is recommended to wash it off if some does get on the paint while applying it to your car windows. 

How to Apply Rain X

cleaning a car window with a microfiber towel

Applying Rain X is pretty straightforward.

You want to begin on an overcast day, not at temperatures below 5 degrees Celsius or 41 degrees Fahrenheit. And you’ll need a microfiber cloth (on Amazon), paper towels, and a glass cleaner (on Amazon) to clean the windshield and remove any dirt or grease beforehand. 

  1. After the windows and windshield are cleaned, ensure the surface is completely dry before adding a small amount of Rain X to a microfiber cloth and the glass itself.
  1. To apply the Rain X, use the microfiber cloth in circular motions on the glass surface. 
  1. For mirrors and windows, you want to start at the top and work your way down, while for the windshield, doing half the glass at a time is recommended. 
  1. Let the treated surface dry for 5 to 10 minutes, and then use a paper towel to buff the glass from the bottom to the top. Don’t worry if you start to see a haze, as this is supposed to happen. Keep buffering until the haze disappears and the glass becomes clean. 
  1. Lastly, it is best to finish off the treatment by cleaning your wiper blades with a glass cleaner and a fresh microfiber cloth. This helps remove any dirt and grime that can smear along the freshly treated windshield.

Keep in mind you’ll only need a small coat so add small amounts at a time.

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