Siless Liner 157 mil (4 mm) 51 sqft Aluminum Foil Finish Car Sound Deadening & Heat Insulation Closed Cell Foam - PE Foam Sound Deadener

Very good stuff really really helped 2001 f250 7.3 made it much much quieter then before! Very impressive! Ac works great now ice cold

Super sticky and easy to install. Glad I chose this brand

Good product, but move slowly on install. When it sticks you cannot reposition.

Basically a large sticker tile, which makes it awesome. It's closed cell foam, thus great insulation for temperatures and noise. It is just a finish, not a real aluminum foil but more like a thin sprayed on paint. For best result, use on top of a noise decoupler like Dynamat/Kilmat/Amazons Basic. Both of these have properties that have worked well in my old vehicle that did not have anything in the roof, rear quarters, doors and floor. Or was very minimal. Picture is the cargo are for example, showing it bedlined with Kilmat, with some Siless closed cell foam insulation, topped with a 10mm foam rubber mat to protect it.

Most sound deadening products cost a small fortune. I own a Jeep Patriot. With this single box I was able to insulate back up to the front seats and the ceiling with enough leftover to do the doors. This doesn’t deaden sound as much as maybe more expensive products would but I know it insulates a little bit and it reduces vibrations. So it makes music sound much better. I give this product 5 stars due to cost effectiveness. It’s easy to use and you get a lot for what you pay for. If it was twice or triple the price it would get a lower rating.

This stuff is pretty easy to apply... just make sure to place it where you want it the first time. My jeep is black so it absorbs the heat and it took a while to cool it down with the ac. This stuff helped so much. It cools down faster and doesn't get as hot. Big difference. It works for noise reduction as well. Great purchase here. I used simple green to clean the surface. A lite amount and rinsed with a clean wet cloth. Holding up under the summer heat.

Great product

Easy to use.. super sticky.. easy to cut to shape where you need it.

Very sticky so be sure to dry fit the panels before to take the vinyl strip off , because as soon as you touch it to the metal there is no adjusting it, however it really does what I wanted it to , to reduce sound , vibration and heat inside the truck cab

I'm not sure what the foil adds except a layer on top to rip. These used to be simple closed-cell foam but I have no idea why they are including a micron-thick layer of foil to the top - for what reason??? These are not forgiving to work with. Once you lay it down, it sticks, and will rip if you try to reposition. This makes them very hard to work with in tight spaces or when trying to slide under something.