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I bought enough Siless matt to do the entire floor plus the thicker panels to line the floor. I like this system better than the dynamatt and it's cheaper.
Any product primarily Butyl Rubber and Aluminum backing. This insures it doesn't smell (off gas) on a hot day like the tar base products. I gave you a link below, which is a good deal and what I used. Flea bay might have it even cheaper . https://www.rockvilleaudio.com/rm36-b/
keep in mind that dynamat and similar are very heavy.
The ‘Rockville Rockmat’ indicates 25Lbs per roll.
how many rolls would one use to do a C2 Convertible ??
Adding 25 or even 50 lbs doesn’t seem to be much seeing as a tank of gas is about 120Lbs.
looking at the 2kits from Top Flight (floors + cargo area) the total weight is 9Lbs…. Not ‘Dynamat’ brand but how different are the weights ???