Professional Solution for Studio Soundproofing Why Choose Donner? Donner strictly follows the optimal ratio of raw materials in producing each acoustic foam panel. Some sellers may substitute key components with inexpensive fillers to reduce costs, which can compromise performance and safety. While such products may appear similar, they often fail critical flame retardancy tests. Donner acoustic foam has been tested and certified by SGS for flame retardancy, ensuring safety and quality. Additionally, Donner acoustic foam has been evaluated at the Building Environment Testing Center of Tsinghua University for its Noise Reduction Coefficient (NRC). The test results show an NRC of 0.8, which classifies as Class A sound absorption. An NRC of 0.8 or higher indicates excellent sound absorption performance. Donner Acoustic Foam Panels Quality Kit In recording studios, hard wall surfaces create unwanted sound reflections, and room corners can produce excessive reverberation, leading to unclear audio. Donner acoustic foam panels effectively address these acoustic issues. Made from advanced polyurethane sound-absorbing material and formed through a refined foaming process, Donner soundproofing foam enhances room acoustics by reducing echo and improving sound clarity. Note the difference between sound absorption and sound insulation. Package Included: 12 x Donner Acoustic Foam Panels Important Usage Notice: Upon opening the package, you may notice the foam thickness appears compressed. This is normal. To restore the foam to its original thickness, soak it in water for 5–10 seconds and then allow it to dry completely. Note: Adhesive stickers and spray adhesive are not included. Installation Instructions: You may use adhesive stickers or spray adhesive to mount the panels. Using Adhesive Stickers: Ensure the wall surface is clean, flat, and free of dust or debris. For best results, apply 5 double-sided adhesive stickers evenly on the back of each foam panel before attaching to the wall. Applying stickers directly to the wall may reduce adhesion and cause panels to fall. Using Spray Adhesive: Apply spray adhesive evenly to the back of the foam panels, then press firmly onto a clean wall. For large installations, consider mounting the panels onto a board first using spray adhesive, then secure the board to the wall. Note that spray adhesive may affect wall surfaces upon removal.