Johns Manville Whispertone® Tackboard is a rigid, resilient fiber glass board manufactured using flame-attenuated glass fibers with mat facers on one or both surfaces. Whispertone Tackboard is designed for use in a variety of acoustical panel and office interior product applications in minimal space. It provides superior acoustical performance, uniform color and thickness and is resistant to vibration and shakedown. The top mat surface is smooth and uniform in color and provides a tackable surface. In addition, the Whispertone Tackboard is easy to handle and fabricate.