Are you burning up from the engine heat in your cabin? Maybe your engine is just too loud! The automotive firewall is an important safety element in any vehicle that seems like an obvious place for factory insulation, but in most cases, all you get is a sheet of metal separating the engine compartment from the passenger compartment.

While most car enthusiasts focus on the floor and doors for sound deadening and heat insulation, the firewall is an all-too-often overlooked area where some extra effort can make a big difference in your noise and temperature control. We've got what you need!

If your car is letting in cold or hot air through the roof, you add car roof thermal insulation to stop it from transfering through the roof. Much in the same way, without an extra layer of material between you and the engine, there’s not much stopping that heat from making its way to the interior of the car. Keeping your car cool on hot summer days can be a challenge. Plus, excessive heat exposure can deteriorate your wiring over time (especially if you don’t have or have damaged OEM wiring insulation). Over time, the wires can stop working, short out, or even potentially start a fire in the worst-case scenario. (Yes, that was dramatic but it can happen. You can sit back down now.)

So adding an automotive heat shield and sound deadening material can truly be worth your while. It’ll bring a noticeable reduction in noise and heat. Your stereo equipment will sound better, and you’ll have greater control over your cabin temperature. Overall, it will make your ride much more enjoyable. Not to mention the fact that firewall insulation and soundproofing materials are pretty simple to install. (The coverable area of an average firewall is small – only 10-15 square feet!) And we make it really easy, with industry-best options to accomplish your firewall insulation goals.

Option #1: Sound Deadening Mats

Our sound deadening mat, Damplifier Pro™ is our most popular product. These sound deadening mats have a base of dense elastomeric butyl rubber with a thick annealed foil constraint layer, able to conform to and form a strong bond with sheet metal and rated to 450°F – perfect for a firewall.

Installation is simple: just cut to size with a sharp razor blade, peel to reveal the built-in adhesive, and stick. 60% coverage will be plenty to deaden the metal, but we recommend 100% for a firewall to enhance thermal insulation.

Option #2: Liquid Sound Deadener

Our Spectrum™ spray-on sound deadener has been a leading sound deadening solution for over a decade. This water-based, viscoelastic polymer is easy to apply, easy to clean up and engineered to perform. Essentially a sound deadening paint, it will adhere to most anything besides plastic and is perfect for those tough-to-reach parts of your vehicle (like the firewall!).

Particularly if you're thermal focused, you could apply Firewall™ Ceramic Thermal Insulation. This thermal coating is loaded with insulating glass beads to stop heat transfer through metal. It's an extremely good insulator in your engine compartment and works perfectly in tight spaces. It'll add a little deadening too, but this ceramic coating is designed to be lighter than a true deadener. As we call it Firewall... yeah, your vehicle's firewall is a good place to use it.

Option #1: Installing a Firewall Heat Shield

Upgrade the heat shield with Mega Block™ for a superior heat barrier. Mega Block™ combines water resistant, lightweight and flexible melamine foam with a foil heat shield capable of reflecting 98% of radiant heat energy. By combining both, you get the best of both worlds with an excellent insulating layer under your aluminum reflective barrier for industry-best performance.

Thermal Block™ is our easy-to-use radiant heat barrier composed of highly reflective foil and organic fibers capable of withstanding up to 800°F and redirecting 98% of radiant heat.

We have a video of it in use on our gas tank heat shield page, showing use and ease of install.

Option #2: Installing Cabin Side Firewall Insulation

Like we said, choosing the cabin-side approach is often because of the quality of access granted in engine compartments. A lot of engine compartments are too tight to get the material inside with enough clearance. That's why we highly recommend Luxury Liner Pro™ for cabin-side firewall insulation.

Luxury Liner Pro™ not only insulates with an R-value of 4.45, but it will also block engine noise like no other product! A noise barrier is the only way to block out that turbo or diesel noise.