Hey! This product can be bundled with other popular items to provide you an automatic discount at checkout. Check out our discounted bundles for more info!


3M Thinsulate (SM600L) Acoustic & Thermal Insulation


  • Free ground shipping to continental USA  (physical addresses only – no PO boxes) (Lower 48 States) In-stock and ready to ship! Orders typically ship out the same or the next business day.
  • Price is per linear foot – the material is 60″ (5′) wide so one linear foot covers 5 square feet.
  • Scroll down toward the bottom of the page, in the description to see our recommended amounts for common cargo vans!
  • Ships highly compressed but will expand to a caliper of 42mm (1.65″) over the course of a few weeks once the packaging is opened and the product is installed
  • We ship our Thinsulate pre-cut in 10′-15′ length sections for easier maneuverability and installation.
  • Provides both thermal and acoustic insulation
  • Easy to cut and install
  • Cruelty-Free (Vegan)
  • No “Barn” smell like wool.
  • Hydrophobic fibers resist moisture, mold and mildew
  • R-value: 5.2 (at 1.65″)
  • We recommend combining Thinsulate with Low-E. Check out our blog post on insulating a van.
SKU: Thinsulate SM600L Category:
buy with confidence, secure checkout, world-class support, free shipping


3M Thinsulate provides both thermal and acoustic insulation in one easy-to-install product! Thermal insulation keeps your van warm or cold and the acoustic insulation keeps the van quiet from road noise and ambient noise. In addition, Thinsulate helps to “dampen” the vibration of the sheet metal of your van similar to using sheets of butyl sound deadener like Noico. This allows you to either omit that type of butyl sound deadening entirely or use much less and save on time, money and weight. We highly recommend this type of insulation for your van conversion and use it in all our vans.

Unlike many other insulation products, Thinsulate is manufactured specifically for the purpose of insulating vehicles and therefore has the following advantages:

  • Hydrophobic fibers resist moisture, mold and mildew
  • Flame resistant and meets FMVSS 302 certified motor vehicle safety standards
  • Lightweight material perfect for vehicles. Thinsulate acoustic insulation is made from lightweight polyester and polypropylene non-woven fibers (details in a PDF)
  • Easy to cut and install- especially in ribs and hard to reach crevices
  • Does not off gas and has no noticeable odor
  • Can be removed easily if necessary for modifications or repairs
  • Cruelty-Free Product (Vegan).  “No sheep were harmed in the making of this product”
  • Does not have a “Barn” Smell like wool.

How Much You’ll Need

These recommendations are in ranges from minimum to maximum.  Every van build is different.  If you have or will be installing many windows you can order the lower quantity. If not you should probably order the larger quantity.  Based on insulating the entirety of the walls, ceiling, wheel wells, and structural cavities but not the floor (you may have some extra left over for the headliner over the cockpit).

  • 136″ wheel base Promaster: 40-45 linear feet
  • 159″ wheel base Promaster:  50-55 linear feet
  • 159″ extended wheel base Promaster: 60-65 linear feet
  • 144″ wheel base Sprinter: 50-55 linear feet
  • 170″ wheel base Sprinter: 60-65 linear feet
  • 170″ extended wheel base Sprinter: 70-75 linear feet
  • 148″ wheel base Transit: 50-55 linear feet
  • 148″ extra long Transit: 60-65′ linear feet

We generally recommend about one large can of 3M 90 Spray adhesive for every 20LF of insulation you are purchasing (IE. For a 159″ wheelbase Promaster you will need approximately 3-4 cans of spray adhesive)

The Cool Science How Thinsulate Absorbs Sound To Quiet Your Ride

Sound (noise) is transmitted as waves through the air which oscillate at varying frequencies. When these sound waves interact with the super fiber weave of our 3M Thinsulate material, the friction converts their “acoustic energy” into heat and deadens the sound to quite your ride!

A Word About Compression from 3M (and Vanlife Outfitters)…

3M Thinsulate(TM) comes compressed from the factory (Vanlife Outfitters also ships it compressed). The SM600L is typically about 3/4 to 1″ thick when it comes off the roll.  It will expand over time but can take a number of weeks. It is best (and easier) to install it compressed and let it expand after it is in place. The vibration from driving (and heat) seems to help it to expand (fluff up).  SM600L has a caliper of 42mm (1.65″) and can even expand up to 2″ thick if suspended from the ceiling and depending on the space available. Thinsulate(TM) won’t expand any more than the space allowed and will not push up and cause bowing in trim panels.  Please contact us if you have further questions.


  • Thinsulate can easily be cut to shape with sharp fabric-type scissors. It’s not essential that your cut out shapes match the panel size exactly. You can cut them larger and tuck around the elements.
  • We recommend gluing the Thinsulate to your wall and ceiling panels with 3M 90 spray adhesive. Be sure to spray both the Thinsulate and the wall/ceiling panel for best adhesion.
  • We recommend gluing the “white side” to the sheet metal of the van so that the black “scrim” faces outward.
  • Use a fish tape or wire to pull unglued Thinsulate into cavities and structural elements.
  • Many people report that their entire van can be insulated in a single day with Thinsulate.
  • If you’re working on a Sprinter van, check out this post on the Sprinter Forum where a user shared detailed cutting patterns.
  • Check out our blog post about insulating your van.

Thinsulate data sheet (PDF)

Additional details on the 3M website

In-Stock & Ready to Ship Quickly!

Professional Builders

We encourage you to check out our Builder Network. We can supply network members with a discounted complete rolls (300 feet) of 3M Thinsulate shipped freight directly to your shop. If you're interested, please get in touch and let us know many rolls you need and your shipping zip code and we'll provide you detailed pricing.

Additional information

Weight N/A
Dimensions N/A

5 linear feet, 10 linear feet, 15 linear feet, 20 linear feet, 25 linear feet, 30 linear feet, 35 linear feet, 40 linear feet, 45 linear feet, 50 linear feet, 55 linear feet, 60 linear feet, 65 linear feet, 70 linear feet, 75 linear feet, 80 linear feet