How to Insulate a Car With Thermozite

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Want more control over the noise level and temperature inside your car? Then this DIY is for you! Make your car's interior quieter and cooler with a simple insulation project. In this Automotive Refresh Series DIY video, we're going to insulate the floor of a Volkswagen GTI. You can use the same steps we follow in this tutorial to insulate the floor in any vehicle.

Materials List:

Thermozite Thermal-Acoustic Insulation 48" (#103153)
3M™ General Trim Spray Adhesive 18.1 oz. (#73211)

Tools List:

Sailrite^® Cordless Rotary Cutter (#124044)
Clear Acrylic Ruler 6" x 24" (#102400)
Tape Measure 120" (#102986)

How to Insulate Car Thermozite 2 — A sneak peek at our finished install! Take a look at Thermozite's heat-blocking foil layer.

Good insulation is a must-have in any vehicle. It carries two important benefits. First, it reduces how much outside sound leaks into your car while still allowing you to hear important things such as emergency vehicles. Second, it provides a temperature barrier that reduces how much radiant heat your car takes in from the environment — especially in hot summer weather.

We chose Thermozite Thermal-Acoustic Insulation for our car refresh. Thermozite is a two-sided material. On one side, a tough aluminum foil acts as a radiant heat shield, deflecting excess heat. The other side is 1/4" carpet padding, which helps deaden sound. The polyester padding is made of 100% post-consumer recycled material, making Thermozite an environmentally friendly automotive insulation option. Although we used it as car floor insulation, it's also great for door panels, ceilings, engine compartments and more.

How to Insulate Car Thermozite 3 — Insulating your car is as easy as measure, cut, glue and install! We put adhesive on Thermozite's carpet padding side.

Never insulated a car before? Never fear — this is a quick and easy project you can do in an evening! This no-sew DIY is perfect for beginners because it only calls for a handful of tools and materials. Plus, our how-to video will show you all the steps for a successful project, so you won't be alone. Ready to insulate your car? Watch the video now to learn how.

This is the first video in our Automotive Refresh Series. We're giving a 1992 Volkswagen GTI a few simple upgrades that make a big difference in its aesthetic — and they can help you plus up your car too! The next three videos in this four-part series will show you how to sew shifter and parking brake boots, how to reupholster a door panel section, and how to redo headliner. Click here to watch the whole series and get started on these easy car interior upgrades.