Why those black dots on your windshield aren't just for looks
You'll notice black dots of varying sizes on the edges of almost every car's front windshield. Regardless of the car's brand, class, or purpose, they are present. Are you curious about their function?
9:12 AM EDT, September 24, 2024
These small dots serve an essential purpose. To understand this, let's delve into installing a car windshield. Before placing the windshield in the car, its edges are coated with ceramic paint and heated. This treatment allows the adhesive to bond better to the roughened surface, enhancing its effectiveness.
During heating, the paint reaches a much higher temperature than the glass itself. The dots are designed to minimize the temperature difference in a small windshield area, preventing damage. This is why the dots gradually change in size.
Additionally, the black border of the windshield, known as the “frit,” masks the adhesive, shielding it from harmful UV rays, which prolongs its lifespan.
