Bird B Gone SpectrumV Holographic Bird Gel is a highly effective, yet simple-to-use bird repellent that keeps all types of birds away from building ledges and edges. It targets the senses of smell, sight, and touch in birds. Its holographic reflection technique creates visual hot zones that frighten birds away. The gel gives birds a sticky sensation on their feet, making them want to leave the area. It also emits an aroma that is unappealing to birds. For more coverage, add another dish to the perimeter. Excellent for residential and commercial uses in areas such as rooflines, signs, ledges, railings, and other places where birds may congregate.