What is the preferred method to apply urethane?

Applying urethane to the glass is the preferred method because it ensures a more controlled application, allowing for a precise and even distribution of the adhesive. When urethane is applied directly to the glass, it helps in creating a stronger bond between the glass and the frame, as the adhesive can fill any gaps and adhere more effectively during the installation process. This method also minimizes the chances of contamination from dirt or debris that may be present in the frame area.

In addition to facilitating better bonding, placing urethane on the glass allows for easier adjustments during installation, ensuring that the glass can be properly positioned before it sets. This approach contributes to both the integrity of the installation and the overall safety of the vehicle, as a strong and effective seal is critical for maintaining structural integrity and preventing leaks.