The Flock Free Bird Repellent - Tank Mix Kit is a professional, non-toxic commercial bird control solution designed to remove birds from large properties and keep them from coming back. This bundled system combines Flock Free Tank Mix concentrate with InvisiDye UV marker, creating a multi-sensory deterrent that birds can see, smell, and feel — while remaining nearly invisible to people. Unlike single-method bird repellents, this system applies constant pressure using visual, scent, and taste cues. Birds quickly learn that treated areas are uncomfortable and unsafe, forcing them to relocate to more suitable environments.