Review on S'martMat Top Choice: 90 Mil Car Sound Deadener Material (15 Sqft) - Superior Audio Noise Insulation Reduction & Butyl Insulation with Unmatched Strong Adhesion by John Hattalli

I've used Resonix, Dynamat Extreme, SDS, Second Skin Damplifier Pro, Stinger Roadkill, Noico and Killmat in that order. In my experience, they will all do the job for the most part. Resonix and Dynamat cost a little more but are effective with less volume (i.e. less product), which is good if you're doing something that benefits from light weight. . It is heavy and easy to shape. It's sticky but can be changed upon application. The textured surface is good for knowing where to apply more pressure. It's thicker than Noico and Killmat, and you get more bang for your buck. In terms of efficiency, it's about on par with Roadkill in my opinion. I applied this to a 1989 C1500 and it made a noticeable difference. It has a slight odor that leads me to think it's a mix of asphalt and butyl, but even with a heat gun it didn't get sticky like roof repair folks say. Overnight the smell went away but I would suggest giving it a day to dissipate if you can spare the time. Dollar for dollar I think this is one of the best value products at the current price point. You can't go wrong with this stuff.