This layer not only serves to secure the windshield, but also protects the polyurethane sealant from destruction under the influence of the sun, ensuring a strong connection between the glass and the car body.
Until the 60s and 70s of the 20th century, automakers were looking for ways to improve the fastening of the windshield, moving away from the use of rubber seals, which over time cracked and leaked water. The solution was to bond the glass using a polyurethane sealant, eliminating leakage, corrosion and safety issues.
Black dots have become a solution to problems associated with glass bonding, preventing direct sunlight from penetrating the sealant and providing additional aesthetics. In addition, they help hide fastening defects and serve as a design element indicating the originality of the glass. Thus, black spots play an impo
