CTK Block Pro 4.0 Box - acoustic membrane - 1.85m2

CTK Block PRO 4.0 Box - Acoustic Membrane for Blocking Noise 4mm / 10 Sheets CTK Block PRO 4.0 Box This professional, self-adhesive acoustic membrane is designed to effectively block, limit, and reduce road noise inside a car. The product is a flexible mat made of pressed nonwoven fabric and a layer of high-quality polymer with enhanced adhesive properties. The package contains: 10 sheets measuring 370 × 500 mm, which gives a total area 1.85 m² The material has a thickness 4.0 mm, therefore it is intended for demanding applications, especially on lower body elements, which transmit road noise most strongly into the vehicle cabin. The effective CTK Block PRO 4.0 road noise blocking membrane works differently than classic anti-vibration mats. Its main task is not to dampen sheet metal vibrations, but blocking road noise and limiting its further penetration into the car interior. The membrane partially reflects noise towards other sound-dampening or sound-absorbing materials. This makes it ideal as the final layer in a professional soundproofing system. It helps reduce tire noise, road noise, floor rumbling, and sounds transmitted through the lower body sections. A thicker 4 mm version for demanding soundproofing. CTK Block PRO 4.0 has a thickness of 4 mm and a surface weight of 6.26 kg/m² This creates a stronger acoustic barrier than thinner membranes and is better suited for applications requiring high noise isolation. The material is flexible and maintains its properties over a wide temperature range. It can be adjusted to horizontal, slightly inclined, and gently curved surfaces. This is especially important when installing under factory floor coverings or trunk linings. The final layer of professional soundproofing, CTK Block PRO 4.0 Box, is designed for use with other soundproofing materials. The best results are achieved with a layered system:

1. First layer - anti-vibration mat Mounted directly to the sheet metal, its purpose is to dampen vibrations, resonances, and shocks from bodywork components.
2. Second layer - foam, felt or insulating material It reduces noise transmission, improves acoustic insulation and can also act as thermal insulation.
3. Third layer - CTK Block PRO 4.0 It blocks road noise, limits its further penetration into the cabin and partially reflects the sound towards the previous soundproofing layers.

This solution achieves significantly better results than using just one type of material. CTK Block PRO 4.0 seals the entire system from the vehicle's interior and helps effectively isolate the cabin from road noise. For the floor, tunnel, trunk, and wheel arches. CTK Block PRO 4.0 should be used primarily on lower bodywork elements, which transmit the most noise into the vehicle interior. Common applications:

• cabin floor,
• trunk floor,
• central tunnel,
• spare wheel well,
• upper wheel arches in the trunk,
• lower horizontal body elements,
• places exposed to noise from tires and road surfaces.

This product is especially recommended for cars where tire noise, road noise, or rumbling sounds from lower body components are still audible after applying anti-vibration mats and foam. Important application guidelines: CTK Block PRO 4.0 is most effective when applied on top of other soundproofing materials. It is most often laid on foam, felt, or sound-absorbing mats, and then covered with factory floor covering. Due to this application, the adhesion of the membrane to the previous layer may be limited. The polymer layer has self-adhesive properties primarily to ensure the material adheres well to the substrate and prevents shifting under floor coverings. For this reason, CTK Block PRO 4.0 should be installed primarily on the following surfaces:

• horizontal,
• slightly sloping,
• gently bent,
• covered with carpet or upholstery elements.

This material is not intended for installation on vertical surfaces, headliners, or places where very strong structural adhesion is required. Fabric Protects the Factory Carpet: The outer layer of CTK Block PRO 4.0 is made of pressed blue fabric with black graphics. The fabric serves an additional protective function. It separates the factory carpet from the polymer layer, thus reducing the risk of the carpet getting dirty or sticking to the membrane. This is especially important when soundproofing the floor and trunk, where the material remains under the carpet after installation.