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Eko-tech Converting Company
3M™ Thinsulate™ SM300L2025-07-03T13:02:09+02:00
3M Thinsulate
3M Thinsulate

3MTM ThinsulateTM

3M™ Thinsulate™ SM300L

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:

  • Automotive interiors: door panels, instrument panels, pillar trims, headliners, and package trays

  • Exterior vehicle components: wheel arch liners, bumpers, underbody protection

  • Trunk and luggage compartments: sound insulation for interior trim and floors

  • Commercial and specialty vehicles: vans, RVs, agricultural and construction machinery

  • HVAC systems & appliances: where sound absorption and moisture resistance are critical

Why Choose 3M™ Thinsulate™ SM300L?

  • Superior acoustic insulation: Ultra-fine fibers ensure high-energy sound absorption

  • Low weight: Lightweight structure ideal for automotive efficiency

  • Compressible & conformable: Easily adapts to complex panel geometries

  • Non-linting & clean handling: Suitable for clean assembly lines

  • Hydrophobic fiber matrix: Resists water absorption, mold, and odors

  • Durable construction: Embossed, abrasion-resistant surface with a protective scrim

  • Easy processing: Die-cutting, heat sealing, ultrasonic or hot-melt bonding compatible

  • Heat-resistant: Withstands extreme testing up to 462°C (2000 hours)

Why Work with EKO-TECH?

As an official 3M Select Converter, EKO-TECH delivers:

  • Specialist expertise in acoustic materials, adhesives, and 3M product integration

  • Flexible production capabilities for small prototypes to high-volume runs

  • Custom converting with tight tolerances and rapid prototyping

  • Short lead times and consistent supply chain reliability

  • ISO-compliant quality and support tailored to automotive and industrial partner

Converting Services – Tailored SM300L Solutions by EKO-TECH

We provide advanced converting options for 3M™ Thinsulate™ SM300L:

  • Rewinding – Custom roll lengths for ease of handling and storage

  • Slitting – Cut to exact width to match your process or geometry

  • Sheeting – Flat formats for panel assembly and lamination

  • Die-cutting & Kiss-cutting – Ready-to-use parts for automated lines

  • Laminating – With a wide selection of 3M™ pressure-sensitive adhesives, optimized for your surfaces and bonding methods

Not sure what configuration you need? Our engineers co-develop solutions with your team to ensure the perfect fit and performance.

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

FAQ

Does SM300L absorb moisture?2025-07-03T11:32:09+02:00

No – it’s made of hydrophobic fibers, which resist water and prevent odor or mold formation, ideal for humid environments.

Is adhesive bonding possible with SM300L?2025-07-03T11:30:37+02:00

Yes – we laminate it with various 3M™ adhesives, including double-sided tapes or hot melt options, depending on your substrate.

Can SM300L be supplied in die-cut shapes?2025-07-03T11:29:00+02:00

Absolutely. We provide custom die-cut and kiss-cut parts designed for fast assembly.

Is SM300L safe in hot environments?2025-07-03T11:27:16+02:00

Yes – it withstands long-term exposure up to 120°C and was tested up to 462°C over 2000 hours.

What makes SM300L different from other Thinsulate™ materials?2025-07-03T11:25:43+02:00

SM300L offers increased thickness (21mm) and surface weight for even better sound absorption compared to SM200L, while maintaining light weight and water resistance.

Download files

SQCOIN2WCAT0D84EE011_SM300L_02_TDS_161201_R2

Ready to insulate with precision? Choose 3M™ Thinsulate™ SM300L from EKO-TECH.

Contact us today to receive your custom-formatted solution — perfectly cut, laminated, and delivered for your production line. Request a Quote or Sample Now

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