In this second part we will show you how we dealt with the bottom of the Hummer H1.

Showcase Hummer H1 Part 2: Sound Insulation and Anti-drumming

Bottom plate and tunnel insulation
Below you find a movie that shows how the bottom plate of the Hummer is being insulated, using Vibraflex Extreme and Isomat VM. The more flexible alternative STP Bomb is also suitable for the bottom plate. The “bottom plate” indicates the bulkhead, transmission tunnel, wheel arches, and of course the bottom of the vehicle.

Step 1
Before installing equipping the bottom of the car with sound insulating material, the substrate needs to be thoroughly cleaned and degreased first. As for degreasing, you can use break cleaner, for example.

Step 2
Cut the anti-drumming plates to size before you heat them up, since cutting becomes more difficult when they are warm. After cutting, place the plates at the desired places, in order to check if they fit.

Step 3
We advise you to heat up the anti-drumming plates, as this makes them more flexible, which facilitates their installation. In the video, we use a hair dryer, but you can also lay the plates on a radiator.

Step 4
Remove the protection foil of the self-adhesive layer. Then, place the anti-drumming plates on the bottom. Press the plates firmly (or use a pressure roller), making sure no air remains between the bottom and the plates.

Step 5 (optional)
Anti-drumming can also be applied to the door sills, preventing contact noise.

Step 6 (optional)
By placing Isomat VM you can enhance the sound insulation even more. This product contains a wear-resistant top layer, allowing it to be simultaneously used as a floor mat.

More informatie about vehicle insulation
On our page with solutions regarding vehicle insulation you will find the most common problem areas. Additional tips pages about various types of vehicles you will find here:

Questions? Contact
Do you have questions concerning this topic? Please feel free to contact us, we will be happy to answer your question as soon as possible.