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3M™ Thinsulate™ Acoustic Insulation SM400L

Thinsulate Acoustic Insulation AU 2002-5
Thinsulate Acoustic Insulation AU 2002-5
3M™ Thinsulate™ Acoustic Insulation SM400L is a superior sound proofing material used as an acoustic absorber in automotive sound insulation applications.
  • Designed for a variety of acoustic control applications, including vehicle door panels, headliners, wheel wells, pillars, and instrument panels
  • Compressible, lightweight and conformable, this product can easily be die-cut, heat sealed and thermally or sonically bonded to many substrates
  • Constructed with a scrim on each side to protect the fibers
  • Surface treated on both sides to provide better attachment of the scrim and better abrasion resistance of the fiber.
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Key Attributes


ApplicationsReducing NVH in Vehicle Instrument Panels, Reducing NVH in Vehicle Wheel Wells, Reducing NVH in Vehicle Headliners, Reducing NVH in Vehicle Door Panels, Reducing NVH in Vehicle Pillars
Basis Weight Range (g/m²)400-499
Manufacturing SegmentInterior, Powertrain
Surface ColorBlack/Black
Surface TreatmentDouble Scrim