How can I effectively use glue on shower walls for a secure and long-lasting installation?

To effectively use glue on shower walls for a secure and long-lasting installation, make sure to clean the surface thoroughly before applying the glue. Use a waterproof adhesive specifically designed for wet environments like showers. Apply the glue evenly and press the materials firmly together. Allow sufficient time for the glue to cure and avoid getting the glued area wet for at least 24 hours.