CAR & BIKE
2025.09.18
【Autumn Car Care】Coating Glass with Glass!? The Reason for Clear Visibility Even in Sudden Heavy Rain
Even with glass coating, it doesn't repel water, and only the shine of the oily film remains... which is quite common. After 3 years of research and testing over 200 vehicles, the coating is complete, providing clear visibility and a stress-free experience!
New Concept Technology Glass Coating

Frequent sudden downpours in the evenings of this season. Even with glass coating, water may not bead off completely, causing stress while driving. What I found during such times is the "SAPHILAS (Safiras) Quartz Shield," which uses a new concept shield technology that "paints glass with glass."
There's no worry about it peeling off immediately like conventional coatings. It repels water firmly, making it seem safe and comfortable to drive even in sudden heavy rain.
There's no worry about it peeling off immediately like conventional coatings. It repels water firmly, making it seem safe and comfortable to drive even in sudden heavy rain.
Clear visibility with Over Glass technology

A new concept coating based on silicon, the main component of glass. Rather than just forming a film on the surface, it bonds with the glass at a molecular level, creating a strong and highly transparent coating as if an additional layer of glass has been added.
Right after application, it is clear and highly transparent, resistant to friction from wipers, and hard to peel off. Tests indicate that the contact angle of water droplets is large, allowing rainwater to slide off easily, and durability has improved by 2 to 3 times compared to conventional products. In driving tests, rain droplets slide off even at speeds of 40 km/h, resulting in a 50% reduction in wiper usage. Visibility remains clear even on rainy days, suggesting that driving can be done without stress.
Right after application, it is clear and highly transparent, resistant to friction from wipers, and hard to peel off. Tests indicate that the contact angle of water droplets is large, allowing rainwater to slide off easily, and durability has improved by 2 to 3 times compared to conventional products. In driving tests, rain droplets slide off even at speeds of 40 km/h, resulting in a 50% reduction in wiper usage. Visibility remains clear even on rainy days, suggesting that driving can be done without stress.
A high-performance guardian for your beloved car

It controls the refractive index of the glass to reduce glare from headlights of oncoming traffic at night. The “oily film-like glare” that has been felt until now can also be mitigated.
Additionally, the over-glass layer acts as a cushion, reducing the unpleasant noise often caused by the harder wipers of imported cars, which makes a "gaga-gaga" sound, and protects against fine scratches caused by flying stones. Of course, it repels water and is a strong ally that helps maintain and protect your beloved car beautifully.
Additionally, the over-glass layer acts as a cushion, reducing the unpleasant noise often caused by the harder wipers of imported cars, which makes a "gaga-gaga" sound, and protects against fine scratches caused by flying stones. Of course, it repels water and is a strong ally that helps maintain and protect your beloved car beautifully.
Easy to use and long-lasting effects.

The application takes about 3 minutes, but the effect lasts for 6 to 12 months. The usage is simple: first, remove dirt and water stains from the glass and ensure it is completely dry. Apply an appropriate amount evenly to the glass surface and wipe it off immediately with a dry cloth. Curing is completed in 3 minutes, and the film settles in.
It can be driven in the rain right after application, and it's less prone to unevenness, which is also a feature. With this, even a novice like the author can achieve a finish similar to professional application!
It can be driven in the rain right after application, and it's less prone to unevenness, which is also a feature. With this, even a novice like the author can achieve a finish similar to professional application!
Product name: Quartz Shield
Price: From 5,310 yen
Capacity: 100ml (approximately enough for 10 front windshields)
Durability: 6 to 12 months (varies depending on the environment)
Applicable Areas: Front, side, rear glass, door mirrors, sunroofs
Application time: About 3 minutes per sheet of glass
Price: From 5,310 yen
Capacity: 100ml (approximately enough for 10 front windshields)
Durability: 6 to 12 months (varies depending on the environment)
Applicable Areas: Front, side, rear glass, door mirrors, sunroofs
Application time: About 3 minutes per sheet of glass
● Japan Link Products
- *Water-repellent coating for cars
- Akiko Morioka
- car accessories
- glass coating
- motorcycle
- water-repellent