QuietPutty has been specifically designed to maintain the performance of acoustically rated walls. QuietPutty is designed to acoustically seal fire rated electrical, phone and plumbing outlet boxes. No special skills or tools are required. To ensure adequate adhesion, all surfaces shall be clean and free of dust, grease, oil, loose materials, rust or other substances. QuietPutty is non-toxic, chemically inert, and contains no hazardous materials.