Car Heat Sound Deadening Insulation Mat, - 394 Mil 10.8 Sqft Automobile Sound Deadening & Heat Insulation Material for Auto Hood Engine Roof Door and Trunk,40 Inch x 40 Inch, Aluminum Foil Finish

Great product, good quality, and as it was described for a nice reduction, sound absorption, and for heat resistance.

I needed to replace the failing fiberglass insulation that was original in my 1996 motorhome. The original insulation was providing some sound/heat protection inside of my generator cabinet but it was falling apart. After cleaning off the failing insulation and adhesive, this new insulation seemed to stick well to the interior cabinet walls. I could easily cut this insulation with my scissors but it does make the backing paper try to shred at the cut edges instead of peeling off in one motion. Just being careful I could ensure that all of the protection paper came off to allow full adhesion to the metal walls. It was fairly easy to attach and turn corners. NOTE: this item could probably be stretched to the advertised 40" x 40" but I wanted to install it in its relaxed size of 38" x 38". I had plenty to cover the inside of generator cabinet fully. It did reduce the noise some from my generator. I guess I could also install more of this insulation on the outer walls of the generator quieting down even more of the noise inside my motorhome. So far it is sticking well but if things change I will edit my review of this product.

Reduced heat going into my engine bay and my back trunk. Adhesive could be better, but the material is sufficient. One roll is enough for an engine and trunk of a honda civic. If you have a bigger vehicle, you'll need two. Cheap price and works. Good value and simple to install.

Generous amount of insulation with thick foil cover. Adhesive on back side not very strong.

I use this stuff on all my older cars, sometimes on top of the kill mat style stuff. Great quality. Just make sure the surfaces are cleanish and it sticks great. Soft and squishy, nice non-organic replacement for some of the other stinky horse hair insulation.

Acoustic properties are good. This product reduced cabin noise and provides adequate thermal protection of my hood.

Description is incorrect. Size is 37" x 37". I purchased one of these based ont he 40"x40" size specification but its actually only 37" square and I need more.

A little tricky to install on a 1991 Nissan Figaro. Take your time installing it. Especially do your best measuring and laying it down with a plan. I could not tell the noise difference under 30mph. But beyond that it’s noticably a little quieter. My sound system with sub woofer sound a lot better…. No engine noise interference. Be careful when you lay it down and not too out too much pressure, else it can rip unexpectedly. Also clean the surface area where you are install this and make sure it’s grease/oil/dirt free. Worth every penny. I am going to buy this again and install it on my Ram 1500 truck. See my before and after pictures