

3MTM ThinsulateTM
3M™ Thinsulate™ Acoustic Insulation SM300L
3M™ Thinsulate™ Acoustic Insulation SM300L represents the next generation of lightweight, high-performance sound-absorbing materials. Developed for demanding automotive and industrial applications, SM300L combines excellent acoustic absorption with compressibility, water resistance, and ease of processing.
At EKO-TECH, we maximize the performance of Thinsulate™ SM300L through tailored converting services — from rewinding and slitting to sheeting, kiss-cutting, and laminating with 3M™ adhesives. Whether you’re building quiet, premium car interiors or improving the sound profile of technical assemblies, SM300L is engineered to meet your expectations.
Where to Use SM300L
3M™ Thinsulate™ SM300L is ideal for:
Why Choose 3M™ Thinsulate™ SM300L?
Why Work with EKO-TECH?
As an official 3M Select Converter, EKO-TECH delivers:
Technical data:
Composition web 65% polypropylene, 35% polyester
Composition scrim 100% polypropylene
Construction and colour White web with single black scrim
Material Thickness 21 mm (tested after 6 weeks on roll according SAE J1355 @ 0,002psi (14N/m²))
Surface weight 357 g/m² (web and scrim; tested on 315 x 315 mm samples)
Density 16,2 kg/m3
Flammability Self-Extinguishing (SE) as per SAE J369 (FMVSS 302, ISO 3795, DIN75200)
Temperature resistance 120°C (tested for 2000 hours)
Storage Rolls need to be stored upright.
Availability
die cuts as per customer requirement
– plain cut, hot trim edge or sealed edge
– available with adhesive



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