Select Page

I’ve never driven the GT so I have no idea if sound deeding is even needed. My goal for the GT is to be my daily driver up to retirement and beyond. Therefore, I plan to use it for quite a few years so its imperative to have a comfortable car to service my requirements.

What to consider:

My main goal is to be able to have normal conversations. In other words, I don’t want to be competing with road and car noises. I do have some hearing loss and I have personally found many modern cars have enough road noise to restrict a regular conversation.

Additionally, there is a consideration for acoustics and audio systems. Ten years ago that very likely would have mattered. Not so now. Modern technology presents alternative options for audio. My young adult children for example want to use Bluetooth to connect their own gadgets wherever they go. Likewise, I’m doing the same more and more.

Some of the portable and rechargeable Bluetooth speakers available put out a pretty decent sound. Also, over the last year, I’ve tended to use personal Bluetooth headsets with great quality audio throughout the day. Importantly, this allows me to connect with a growing amount of audible content on my own device and that gives access to multiple sources. For example, audiobooks, music, streams of content that I learn from throughout most days, news, on-line study lectures, and my phone calls are picked up automatically. Fantastic.

Then there’s the heat generated from the gearbox tunnel and the exhaust system. Importantly, living in a hot climate I want to install an AC system so it’s important to insulate for heat in the GT.

Sound Deadening:

Researching which product will best meet my goals at a cost-effective price presents many options. Regarding sounddedening, there are primarily 2 sound-deadening materials commonly used. Firstly, foam products absorb sound. Secondly, a tar-based Butyl product when stuck to the surface acts to reduce sound-related vibration being transferred through the flat metal body panels. For the GT I primarily used Butyl.

Additionally, I used a 15mm heat rated foam underlay on the floors and front bulkhead.

Heat shield:

There was already a fibreglass based heat shield over the front portion of the gearbox tunnel. The remainder of the tunnel was covered with the Butyl sound deadener. Finally, overall the tunnel and the front bulkhead, I added a 10mm peel and stick foam-based heat shield from Clark Rubber, Australia.


Use an alcohol-based product to clean the surface first. Secondly, the right tools make applying the Butyl product much easier. When ordering, also order the roller wheel to work it onto all the surfaces. Additionally, besides the rounded wooden handle on the back of the roller tool, I improvised some tools at home to work corners and around obstructions. For example, a potato peeler with the cutting part taken out is excellent for getting in sharp corners and edges. Thirdly, use the alfoil tape on all the seams and finish off all the edges to prevent moister and cutting your fingers in the future.

Finally,  it’s important not to leave air pockets under the Butyl sheets.  Moister can get trapped which can lead to rust in the future. Not a good scenario. I cut around some floor cavities so as not to leave air pockets. These spots can be maintained with a regime of regularly dressing with rust prevention. For example, I use lanolin-based rust prevention as part of my regular maintenance, once a year I’ll lift the mats and brush it into these seams, cavities and crevasses.


Overall, there is quite a lot of sound deadening and heat shield product throughout the car. Do some research on what is available, how it works, and where to use it. Additionally, understand your goals and budget to decide on the way to progress your project.

Happy MG trails…..