Kei Project
Covers 25 sq ft (5 ft wide × 5 ft long). How much do I need?
SM600L is 5 ft wide, so each linear foot covers 5 sq ft. Not sure how much you need? Try our Thinsulate calculator.
| Length | Coverage |
|---|---|
| 5 ft x 5 ft | 25 sq ft |
| 5 ft x 10 ft | 50 sq ft |
| 5 ft x 20 ft | 100 sq ft |
| 5 ft x 30 ft | 150 sq ft |
| 5 ft x 40 ft | 200 sq ft |
| 5 ft x 50 ft | 250 sq ft |
| 5 ft x 60 ft | 300 sq ft |
| 5 ft x 70 ft | 350 sq ft |
| 5 ft x 80 ft | 400 sq ft |
| 5 ft x 90 ft | 450 sq ft |
| 5 ft x 100 ft | 500 sq ft |
| 300 ft master roll | 1,500 sq ft |
3M™ Thinsulate™ Acoustic Insulation SM600L is a lightweight, non-woven insulation that absorbs road noise and keeps your van comfortable. Fine microfibers absorb high-frequency sound, while thicker fibers give it structure and loft. Lengths ship as pre-cut 10 ft sections for easy handling, or choose a full pre-cut kit for your van.
Ships compressed: SM600L comes off the roll about 1/2" to 3/4" thick. Install it compressed and it re-lofts.
3M documents: Technical Data Sheet · Regulatory Data Sheet · Article Information Sheet
As a 3M Preferred Converter, Kei Project supplies genuine 3M™ Thinsulate™ SM600L with lot-level traceability.
Pick your van in our Thinsulate calculator to get linear feet, square feet and adhesive cans in one step, or use the chart below.
| Manufacturer / Model | 3M Thinsulate Required — Walls & Ceiling |
|---|---|
| Sprinter 144″ wheel base, high roof | 50 linear feet |
| Sprinter 170″ wheel base | 60 linear feet |
| Sprinter 170″ extended wheel base | 70 linear feet |
| Transit 130″ wheel base | 40 linear feet |
| Transit 148″ wheel base, medium or high roof | 50 linear feet |
| Transit 148″ extended, high roof | 60 linear feet |
| ProMaster 136″ wheel base | 40 linear feet |
| ProMaster 159″ wheel base | 50 linear feet |
| ProMaster 159″ extended wheel base | 60 linear feet |
| Note: We generally recommend about one large can of 3M 90 Spray Adhesive for every 20 linear feet of insulation you are purchasing. Example: For a 159″ wheelbase ProMaster (50 LF), you’ll need approximately 3 cans of spray adhesive. | |
| Sheet Size | Linear Feet |
|---|---|
| 5 ft × 5 ft | 5 Linear Feet |
| 5 ft × 10 ft | 10 Linear Feet |
| 5 ft × 20 ft | 20 Linear Feet |
| 5 ft × 30 ft | 30 Linear Feet |
| 5 ft × 40 ft | 40 Linear Feet |
| 5 ft × 50 ft | 50 Linear Feet |
| 5 ft × 60 ft | 60 Linear Feet |
| 5 ft × 70 ft | 70 Linear Feet |
| 5 ft × 80 ft | 80 Linear Feet |
| 5 ft × 90 ft | 90 Linear Feet |
| 5 ft × 100 ft | 100 Linear Feet |
3M™ Thinsulate™ SM600L Specs & Composition
Typical values for SM600L roll goods from the official 3M™ Technical Data Sheet (February 2026). 3M notes these values are based on limited testing and are not for specification purposes.
| Property | Value |
|---|---|
| Composition | 65% polypropylene fibers, 35% polyester staple fibers, black 100% polypropylene non-woven scrim on one face |
| Basis weight | 672 g/m² |
| Thickness (nominal) | 42 mm (about 1.65 in) once fully lofted, per SAE J1355. Ships compressed and expands after installation. |
| Density | 15.3 kg/m³ (about 0.95 lb/ft³) |
| Flammability | Self-extinguishing (SE) per SAE J369 (FMVSS 302, ISO 3795, DIN 75200) |
| Temperature resistance | 120 °C (tested for 2,000 hours); not recommended where temperatures stay above 120 °C |
| Sound absorption (normal incidence) | About 0.87 or higher from 800 Hz upward, peaking near 0.99 at 1,250 Hz (read from 3M's published curve) |
| Roll width | 5 ft (60 in), sold by the linear foot |
| Feature | Details |
|---|---|
| Roll width | 60 in |
| Thickness / weight | 1.65 in (42 mm) thick, 0.95 lb/ft³ |
| Application recommendations | Door panels, headliners, instrument panels, van walls, pillars |
| Style | Fibers are contained in a single black scrim. |
| Quiet | 3M™ Thinsulate™ has highly efficient acoustic absorption, particularly in middle- to high-frequency ranges. |
| Light | Made from lightweight polyester and polypropylene non-woven fibers. |
| Easy to install | Lightweight and easy to handle compared to other insulation materials. Can easily be die-cut, heat sealed, and thermally or sonically bonded to many other substrates. |
| Mold, mildew and moisture resistant | Exceptional moisture resistance, with no need to install an additional waterproof layer. Also resistant to mildew growth, minimizing the risk of offensive odors. |
| Fire-resistant | Meets FMVSS 302 requirements for fire resistance in automotive insulation. |
3M™ documents
- 3M™ Thinsulate™ SM600L Technical Data Sheet (PDF)
- 3M™ Thinsulate™ Regulatory Data Sheet (PDF)
- 3M™ Thinsulate™ Article Information Sheet (PDF)
Common Questions About SM600L
What is the R-value of 3M Thinsulate SM600L?
3M does not publish an R-value for SM600L. It is rated as an acoustic insulation, and its technical data sheet reports sound absorption, weight, thickness, flammability and temperature resistance rather than thermal resistance. Many van builders use it for both sound and thermal comfort, but we don't quote an R-value that 3M hasn't published.
What is SM600L made of?
A non-woven web of 65% ultra-fine polypropylene fibers, which absorb sound energy at low weight, and 35% polyester staple fibers, which add strength, with a black polypropylene scrim on one face. The fibers are hydrophobic, so they don't absorb water.
Does Thinsulate SM600L smell?
3M's Article Information Sheet lists SM600L as "odorless."
Is SM600L safe to use in a camper van?
3M classifies SM600L as an article, so it does not require a Safety Data Sheet, and under normal use 3M states it does not release a hazardous chemical. 3M's Regulatory Data Sheet states it meets EU RoHS limits, contains no Substance of Very High Concern above 0.1% by weight under EU REACH, and has no intentionally added PFAS. See the Regulatory Data Sheet and Article Information Sheet for 3M's full statements.
What adhesive should I use with SM600L?
We recommend 3M™ 90 spray adhesive, about one large can for every 20 linear feet of insulation. See the sizing table above for how many linear feet your van needs, or use our Thinsulate calculator.
Product information
Shipping:
- Processing Time: Orders are processed within 1 business day, Monday to Friday.
- Delivery Time: Estimated delivery is 3 to 4 business days, depending on your location and the carrier.
- Shipping Area: We ship to the lower 48 states.
- Shipping Cost: Most orders ship free within the United States. A few oversized items ship by freight, and the 5 ft x 300 ft 3M Thinsulate master roll requires a freight quote before you order.
Returns:
- Return Window: Most products can be returned or exchanged within 30 days of delivery, as long as they are in new condition.
- 3M Thinsulate: Can be returned only if uncut and unused. Master rolls are not returnable.
- How to Return: Email Support@keiproject.com with your order number before sending anything back. The customer pays return shipping.
- Restocking Fee: A 10% restocking fee is deducted from the refund.
- Refunds: Approved refunds are processed within 7 business days of receiving and inspecting your return.
Pick your van in our Thinsulate calculator to get linear feet, square feet and adhesive cans in one step, or use the chart below.
| Manufacturer / Model | 3M Thinsulate Required — Walls & Ceiling |
|---|---|
| Sprinter 144″ wheel base, high roof | 50 linear feet |
| Sprinter 170″ wheel base | 60 linear feet |
| Sprinter 170″ extended wheel base | 70 linear feet |
| Transit 130″ wheel base | 40 linear feet |
| Transit 148″ wheel base, medium or high roof | 50 linear feet |
| Transit 148″ extended, high roof | 60 linear feet |
| ProMaster 136″ wheel base | 40 linear feet |
| ProMaster 159″ wheel base | 50 linear feet |
| ProMaster 159″ extended wheel base | 60 linear feet |
| Note: We generally recommend about one large can of 3M 90 Spray Adhesive for every 20 linear feet of insulation you are purchasing. Example: For a 159″ wheelbase ProMaster (50 LF), you’ll need approximately 3 cans of spray adhesive. | |
| Sheet Size | Linear Feet |
|---|---|
| 5 ft × 5 ft | 5 Linear Feet |
| 5 ft × 10 ft | 10 Linear Feet |
| 5 ft × 20 ft | 20 Linear Feet |
| 5 ft × 30 ft | 30 Linear Feet |
| 5 ft × 40 ft | 40 Linear Feet |
| 5 ft × 50 ft | 50 Linear Feet |
| 5 ft × 60 ft | 60 Linear Feet |
| 5 ft × 70 ft | 70 Linear Feet |
| 5 ft × 80 ft | 80 Linear Feet |
| 5 ft × 90 ft | 90 Linear Feet |
| 5 ft × 100 ft | 100 Linear Feet |
3M™ Thinsulate™ SM600L Specs & Composition
Typical values for SM600L roll goods from the official 3M™ Technical Data Sheet (February 2026). 3M notes these values are based on limited testing and are not for specification purposes.
| Property | Value |
|---|---|
| Composition | 65% polypropylene fibers, 35% polyester staple fibers, black 100% polypropylene non-woven scrim on one face |
| Basis weight | 672 g/m² |
| Thickness (nominal) | 42 mm (about 1.65 in) once fully lofted, per SAE J1355. Ships compressed and expands after installation. |
| Density | 15.3 kg/m³ (about 0.95 lb/ft³) |
| Flammability | Self-extinguishing (SE) per SAE J369 (FMVSS 302, ISO 3795, DIN 75200) |
| Temperature resistance | 120 °C (tested for 2,000 hours); not recommended where temperatures stay above 120 °C |
| Sound absorption (normal incidence) | About 0.87 or higher from 800 Hz upward, peaking near 0.99 at 1,250 Hz (read from 3M's published curve) |
| Roll width | 5 ft (60 in), sold by the linear foot |
| Feature | Details |
|---|---|
| Roll width | 60 in |
| Thickness / weight | 1.65 in (42 mm) thick, 0.95 lb/ft³ |
| Application recommendations | Door panels, headliners, instrument panels, van walls, pillars |
| Style | Fibers are contained in a single black scrim. |
| Quiet | 3M™ Thinsulate™ has highly efficient acoustic absorption, particularly in middle- to high-frequency ranges. |
| Light | Made from lightweight polyester and polypropylene non-woven fibers. |
| Easy to install | Lightweight and easy to handle compared to other insulation materials. Can easily be die-cut, heat sealed, and thermally or sonically bonded to many other substrates. |
| Mold, mildew and moisture resistant | Exceptional moisture resistance, with no need to install an additional waterproof layer. Also resistant to mildew growth, minimizing the risk of offensive odors. |
| Fire-resistant | Meets FMVSS 302 requirements for fire resistance in automotive insulation. |
3M™ documents
- 3M™ Thinsulate™ SM600L Technical Data Sheet (PDF)
- 3M™ Thinsulate™ Regulatory Data Sheet (PDF)
- 3M™ Thinsulate™ Article Information Sheet (PDF)
Common Questions About SM600L
What is the R-value of 3M Thinsulate SM600L?
3M does not publish an R-value for SM600L. It is rated as an acoustic insulation, and its technical data sheet reports sound absorption, weight, thickness, flammability and temperature resistance rather than thermal resistance. Many van builders use it for both sound and thermal comfort, but we don't quote an R-value that 3M hasn't published.
What is SM600L made of?
A non-woven web of 65% ultra-fine polypropylene fibers, which absorb sound energy at low weight, and 35% polyester staple fibers, which add strength, with a black polypropylene scrim on one face. The fibers are hydrophobic, so they don't absorb water.
Does Thinsulate SM600L smell?
3M's Article Information Sheet lists SM600L as "odorless."
Is SM600L safe to use in a camper van?
3M classifies SM600L as an article, so it does not require a Safety Data Sheet, and under normal use 3M states it does not release a hazardous chemical. 3M's Regulatory Data Sheet states it meets EU RoHS limits, contains no Substance of Very High Concern above 0.1% by weight under EU REACH, and has no intentionally added PFAS. See the Regulatory Data Sheet and Article Information Sheet for 3M's full statements.
What adhesive should I use with SM600L?
We recommend 3M™ 90 spray adhesive, about one large can for every 20 linear feet of insulation. See the sizing table above for how many linear feet your van needs, or use our Thinsulate calculator.
PRODUCT DETAILS
Enhanced Acoustic Absorption
Supports Weight Reduction Goals
Moisture and Mold Resistance
Versatile Application
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