ResoNix CCF Decoupler Sound Deadening Foam Sheets – 13.5 Square Feet

      ResoNix CCF Decoupler Sheets and Tape are high-quality closed-cell foam products designed to prevent vibrations and rattles between panels in vehicles. They serve as a cushioning layer that isolates panels from each other, reducing noise from panel-on-panel vibration and buzzes, and enhancing the effectiveness of sound barriers. These products feature an automotive-grade adhesive backing, making them easy to install and ensuring they remain securely in place over time.

      As of March 2025, Only CCF Decoupler 3S is available in a sheet form. Though, the other versions are still available in our CCF Tape.

       The primary differences among the 3F, 3S, and 7S versions are their thickness and firmness. The 3F is a 3mm thick foam that is more firm, suitable for areas requiring additional structural support. The 3S is also 3mm thick but is a softer foam, ideal for tight spaces needing gentle cushioning. The 7S is a 7mm thick soft foam, providing extra cushioning for areas with looser tolerances where more thickness can be accommodated.

      Choosing the right version depends on your specific application and the space available. For very tight areas where minimal thickness is essential, the 3S soft foam is recommended due to its thinness and softness. If you need some structural support in tight spaces, the 3F firm foam is a good choice. For areas with more room and looser tolerances, the 7S soft foam offers additional cushioning with its greater thickness.

      These products are primarily used to prevent audible rattles caused by panels vibrating against each other in vehicles. Common applications include doors and door panels smaller trim pieces, rear decks smaller trim pieces, dash trim, pillars, and various small and tight tolerance interior panels. They are also used to decouple noise barriers, such as mass-loaded vinyl, enhancing their effectiveness by reducing energy transfer from the vehicle’s body.

      The foam acts as a cushioning layer between two surfaces, isolating them from direct contact. By providing a soft and compliant substrate, it absorbs and dissipates vibrations, preventing panels from vibrating against each other. This reduces noise caused by rattling and improves the overall acoustic performance of the vehicle.

      Yes, ResoNix CCF Decoupler products are designed to be effective even in tight tolerance areas. The 3mm versions, both the soft (3S) and firm (3F) foams, are particularly suitable for spaces with limited clearance where a thin yet effective decoupling layer is needed.

      Installation is straightforward due to the peel-and-stick automotive-grade adhesive backing. Simply cut the foam to the desired shape and size, peel off the backing paper, and apply it to a clean surface. The adhesive is very strong, so it’s important to position the foam carefully, as it will adhere firmly upon contact.

      Compression deflection measures the foam’s firmness, indicating how much pressure is needed to compress it by a certain percentage. A lower value means the foam is softer. Compression set refers to the foam’s ability to return to its original thickness after being compressed. Low compression set values mean the foam maintains its shape over time. These properties are important for effective decoupling, ensuring the foam provides consistent cushioning without becoming permanently compressed.

       ResoNix CCF Decoupler Foams have a very specific set of these specifications that are perfect for our use case in aftermarket automotive installations. In comparison, pretty much every other foam sold to this market is much stiffer and is not ideal in any way for our uses, but its very cheap and easy to make a lot of profit on for those other companies. Good for them, but we prefer to stick with offering something that puts performance and functionality as the most important aspects of our products :)

      An automotive-grade acrylic-based peel-and-stick adhesive is used, ensuring a strong and lasting bond even in demanding automotive environments. This adhesive is designed to withstand temperature fluctuations and maintain adhesion over time. Please note, the adhesive is VERY strong. Be careful and move with intent when installing these products.

      Yes, these products are engineered to perform across a wide temperature range. The soft foam versions (7S and 3S) are rated for use from -65°F up to 300°F, while the firm foam (3F) is suitable from -40°F to 200°F, all per ASTM D1056 testing standards. This makes them appropriate for various automotive applications where temperature extremes may occur.

       Yes, the foam used in these products meets flammability standards for automotive applications. The soft foam versions comply with the FMVSS 302 standard, with a maximum burn rate of 4 inches per minute. The firm foam also passes flammability tests for the specified thicknesses under FMVSS 302.

       ResoNix CCF Decoupler products are designed with optimal compression deflection and compression set specifications, making them more effective at decoupling panels than many other foams. Unlike the very popular and common cheap ensolite foams that plague the automotive sound deadening market, which are stiff and very non-compliant, ResoNix foams provide the right balance of softness and structural support. Additionally, being closed-cell foam, they do not absorb moisture like open-cell foams, preventing issues with mold and mildew.

       Absolutely. These decoupling products can be used in conjunction with other sound-deadening materials such as constrained layer damping sheets, noise barriers, and fiber mats. By combining different materials, you can achieve comprehensive sound treatment and address various sources of noise and vibration in your vehicle. Read about our suggestions in the ResoNix Buyers Guide article. 

      Closed-cell foam consists of cells that are completely enclosed and not interconnected, making it resistant to water absorption and providing better structural support. Open-cell foam has interconnected cells that can absorb moisture. In automotive applications, closed-cell foam is preferred because it does not retain water, preventing mold and mildew growth, and provides better decoupling properties.

      No, since it is made from closed-cell foam, it does not absorb moisture. This characteristic makes it suitable for automotive environments where exposure to moisture can be a concern. Using closed-cell foam helps prevent mold, mildew, and degradation over time.

      The thickness varies depending on the version. The 3S and 3F foams are both approximately 3.2mm thick, suitable for tight spaces. The 7S foam is about 6.5mm thick, providing extra cushioning for areas where more thickness can be accommodated.

       Yes, these products are ideal for use in speaker installations to prevent vibrations and rattles. The firm foam (3F) is particularly suitable for sealing speakers to baffles, and sealing said baffles to panels, or for use under heavier components like amplifier racks, providing both decoupling and necessary structural support.

      Yes, these products are designed for longevity in automotive environments. The closed-cell foam is resistant to moisture and temperature fluctuations, and the adhesive backing ensures a secure bond. This durability means that once installed, the decoupler will continue to perform effectively over time.

      The sheets are available in sizes of 54 inches by 36 inches for the sheets, providing 13.5 square feet of material. The tape versions vary: the 3S soft tape is 3mm thick, 0.75 inches wide, and 40 feet long; the 3F firm tape is 3mm thick, 0.75 inches wide, and 50 feet long; and the 7S soft tape is 7mm thick, 1 inch wide, and 20 feet long.

     Yes, all ResoNix CCF Decoupler products, and all of our other sound treatment products are made in America, ensuring high quality and supporting domestic manufacturing.

The technical documents for each foam and the adhesive that they use can be found below.

ResoNix CCF Decoupler 3S & 7S Foam Technical Specs.

ResoNix CCF Decoupler 3F Foam Technical Specs.

ResoNix CCF Decoupler Adhesive Technical Specs.

      Yes, ResoNix CCF Decoupler products can be used alongside Fiber Mat products. While Fiber Mat is recommended for areas where it can fit due to its superior decoupling properties, the CCF Decoupler is ideal for tight spaces where the Fiber Mat may not be suitable. Combining these products (not one on top of the other, but using them along side each other for different tolerance areas) allows you to achieve optimal sound treatment throughout your vehicle.

      Yes, ResoNix CCF Decoupler products can be used alongside Fiber Mat products. While Fiber Mat is recommended for areas where it can fit due to its superior decoupling properties, the CCF Decoupler is ideal for tight spaces where the Fiber Mat may not be suitable. Combining these products (not one on top of the other, but using them along side each other for different tolerance areas) allows you to achieve optimal sound treatment throughout your vehicle.

       ResoNix CCF Decoupler products offer superior performance due to their optimal balance of softness and structural support. They are more compliant than many other foams, providing better decoupling without adding excessive thickness. The closed-cell foam does not absorb moisture, preventing mold and mildew issues. Additionally, the strong adhesive backing and ease of installation make them a practical choice for both professionals and DIY enthusiasts.