CAR & BIKE
2025.09.08
【Summer Car Care】 On hot days, I tried removing the water stains on the glass with "Urocon" at night.
A compound for removing water stains that cannot be used in the blazing sun. So, after sunset when the temperature dropped, I equipped a camping headlight and tested how well "Urocon" could remove the water stains.
When illuminated by a light, the glass water stains become clearly visible

The other day, after returning home, I forgot my belongings in the car and when I illuminated it with my smartphone's light, I exclaimed, "What is this!" The water stains, which I hadn’t noticed much during the day, were all over the window glass.
Was the reason the side mirror was hard to see in the rain because of the water stains?
Was the reason the side mirror was hard to see in the rain because of the water stains?

Although I wanted to take care of it quickly, even in September, it was still over 30 degrees during the day. Additionally, the compound used for water stain care is heat-sensitive, so it often cannot be used in full sun or when the glass is at a high temperature.
Therefore, I decided to start the work after sunset when the temperature is lower. My companion will be a camping headlamp. Since it can be worn on the head, it leaves both hands free and allows me to proceed smoothly, just like during the day.
Therefore, I decided to start the work after sunset when the temperature is lower. My companion will be a camping headlamp. Since it can be worn on the head, it leaves both hands free and allows me to proceed smoothly, just like during the day.

The product I will be using this time is "Urocon," which I purchased from a car shop. It is a glass compound made from silicon carbide, which is the third hardest substance on Earth, processed into ultra-fine particles. Reviews say it is "the best I have ever used" and "was relatively easy to remove," which were high praises. I was also attracted by the word "powerful" on the package, so I decided to choose this among various similar products.
Removing water stains, which requires strength and patience even among car care tasks, would be lucky if it could be easily removed. But how does it actually perform?
Removing water stains, which requires strength and patience even among car care tasks, would be lucky if it could be easily removed. But how does it actually perform?
Product Name: Urocon
Price: Open pricing
Capacity: 80g
● Musashi Holt
Price: Open pricing
Capacity: 80g
● Musashi Holt
While illuminating with a camping headlamp, I removed water spots with Urocon

I washed away dirt and sand from the glass, and the preparation is complete! After dropping the liquid on the sponge included in the package...

I tried scrubbing up and down, left and right. Be careful, as scrubbing too hard may cause scratches.

The guideline is to scrub until the liquid on the glass surface stops beading! I became absorbed and kept scrubbing tirelessly. When I took care of the water spots in June, I was drenched in sweat while battling with them, but this time, since it was a night job, I didn't sweat at all during the application.

Normally, I wouldn't even be halfway done at this stage, but since it was mentioned that I could check with a wrung-out cloth, I wiped a bit. And then... There were no water spots!

This seems promising! When I tried rinsing off the liquid left on the glass surface... the water stains that were so abundant have disappeared. Wow, it feels great to have it this clean.
I was able to remove the water stains in about 7 minutes.

The time taken for this task was about 7 minutes on the driver's side window. I have used various water stain removers before, but this is the first time I completed it in such a short time. Also, being able to thoroughly check for any remaining water stains in every corner by shining a headlight was incredibly helpful. It seems like this method is also good for water stain care in seasons other than summer.