Soundproofing plastic door panels (upholstery), dashboards and other interior plastics requires special soundproofing materials that are highly flexible and have shape memory. For these purposes, we recommend Comfortmat Soft Wave , which perfectly soundproofs plastic parts and prevents unwanted sounds and resonances. The offer also includes materials with a lower thickness for hard-to-reach places; to select the right materials, visit our soundproofing configurator .