On the motor yacht M/Y “Kassandra”, we carried out comprehensive removal and replacement of the existing joints surrounding the vessel’s glass surfaces. The project began with the careful removal of the old sealing materials, followed by thorough cleaning and preparation of the joints and application surfaces to eliminate residual adhesive and sealant. New marine sealing joints were then applied, with particular attention given to uniform installation, restoration of watertight integrity, and protection against potential water ingress. The work was completed with the final finishing of the joints, providing a clean appearance and reliable performance in demanding marine conditions. The project was carried out at Kalamaki Marina, Greece.