In the partial cutout windshield replacement method, what serves as the base for the new adhesive?

In the partial cutout windshield replacement method, the old adhesive serves as the base for the new adhesive. This technique involves carefully removing the windshield while leaving a portion of the existing adhesive intact; this ensures a cleaner and more stable surface that can bond effectively with the new adhesive. The frame of the vehicle typically directs the placement and alignment of the windshield but does not provide the bonding interface.

The new adhesive is applied over the old adhesive, relying on it for structural support and strength. The glass surface, while critical for the proper installation of the new windshield, is not what the adhesive directly bonds to in this method; rather, the bonding action relies on the properties and condition of the remaining old adhesive. Therefore, understanding that the old adhesive acts as the critical base emphasizes its role in creating a secure and durable seal for the new windshield.