3M Thinsulate by the Foot

3M™ Thinsulate™ Acoustic Insulation — SM600L

AVC is now proud to offer 3M Thinsulate cut by the foot! Need a whole van's worth? Buy 45-50 ft.  Need just a little to fill out your front door panels? Did you buy a pre-cut kit and realize you needed about 10 more feet to do the job right? Been there... Buy as much or as little as you need. 

Product details below.

Transform your vehicle or mobile build with 3M™ Thinsulate™ SM600L, the gold standard in high-performance thermo-acoustic insulation. Engineered specifically to tackle unwanted road noise and thermal transfer, this heavy-duty, premium-grade material is the go-to choice for professional van builders, automotive restorers, and DIY camper conversions alike.

Key Features & Benefits

• Superior Acoustic Attenuation: As the thickest and most absorbent option in the SM series, SM600L utilizes a dense matrix of microfibers to efficiently absorb high- and mid-frequency road, engine, and environmental noise.

• Advanced Thermal Control: Delivers exceptional R-value performance, keeping your cabin warmer during freezing winter nights and cooler under blazing summer heat.

• Moisture & Mold Resistant: Built with hydrophobic polypropylene fibers that do not absorb water, drastically reducing the risk of condensation buildup, mold, mildew, and musty odors.

• Lightweight & Compressible: Maximizes energy efficiency and payload capacity without adding dead weight. It easily conforms to complex, irregular surfaces, ribs, and cavities.

• Protected with Durable Scrim: Features a single-sided black polyolefin (non-woven) protective scrim that enhances durability and makes handling and installation cleaner and easier.

• Safety Compliant: Certified self-extinguishing and fully compliant with FMVSS 302 (SAE J369) automotive fire safety standards.

Technical Specifications

• Product Code: SM600L

• Composition: 65% Polypropylene microfibers, 35% Polyester staple fibers (Web); 100% Polypropylene black scrim (One side)

• Nominal Thickness: 42 mm (~1.65 inches, expands fully after unrolling)

• Surface Weight: 672 g/m²

• Roll Width: 60 inches (5 feet)

• Temperature Resistance: Tested up to 120°C (248°F) for continuous long-term exposure