I was looking for a simple, elegant, and inexpensive way to reduce cabin noise from the engine and exhaust.
I have been reading extensively on the forums and tried to find a solution similar to Dynamat that would not involve removing a large portion of my interior. I also did not want to find myself with a permanent modification that was not easily reversible.
"Peel & Seal" is a product that has some of the sound-dampening properties of Dynamat, but is far less expensive (about 25% the cost per square foot). Unfortunately, when this product is applied, it can have an unpleasant odor at warm temperatures and once it is applied to most surfaces, it is not simple (if even possible) for it to be removed.
For me the ideal solution was one that worked, was cheap, could be accomplished quickly, and could be completely reversed.
As far as I know, no one has come up with the method I am about the share. I wish I owned a sound level meter so I could scientifically document the difference in interior noise level. If I get one, I will update this post with a pre and post decible level reading.
Items required for the project:
A WRX Hatchback (mine is a 2014)
A 5'x7' tarp ($4.99)
A roll of "Peel & Seal" 6"x24' ($15.99)
A good pair of scissors
A black Sharpie marker
The first step is to remove the stock hatch liner.
Next lay the liner on the tarp and outline it with the sharpie marker:
Now lay strips of the "Peel & Seal" onto the tarp until you have covered the area outlined. This effectively creates a new hatch liner made of "Peel & Seal" and tarp. Cut out with the scissors and place in the hatch.
Now, make 4 strips of tarp/"peel & seal" with the remaining tarp pieces. 2 should be 24" long (to place behind the fabric of the passenger rear seat in the hatch) and 2 should be 14" long (to place behind the fabric behind the driver side rear seat in the hatch). Sorry-- no pic of this process. It's very easy, however (and I will show where these strips go below):
Now replace the hatch liner:
Give the car a drive and see if you notice a difference. I did. I plan to test the actual sound difference with a sound meter at some point in the future.
Does it make a world of difference? No. Is it cheap, quick, & reversible, YES!
If you try it, please share with me your experiences.