Review on Siless 80 Mil (2Mm) 36 Sqft Car Sound Deadening Mat - Butyl Automotive Sound Deadener - Noise Insulation And Vibration Dampening Material (36 Sqft) by Andrew Mack

My main concern with this was the smell, which is very slight during install and goes away very quickly (didn't notice after install). Easy to cut/slice. It adheres great. Sound attenuation is good but not amazing - I assume 2 layers would be better. Definitely a noticeable improvement (for someone very annoyed by rattles/road noise) by just doing 30-40% of the inner and outer front and rear door skins, 10% of the plastic door panel, and 40% of the trunk lid on a 2010 base-model civic sedan. I estimate I have enough left over to do the trunk floor and floor of the car at close to 50%.