---
product_id: 521423996
title: "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"
brand: "allwin"
price: "€ 165.33"
currency: EUR
in_stock: true
reviews_count: 8
category: "Allwin"
url: https://www.desertcart.gr/products/521423996-car-heat-sound-deadening-insulation-mat-394-mil-10-8
store_origin: GR
region: Greece
---

# 10.8 sqft coverage for broad application 394 mil thickness for max heat resistance Flexible, easy-cut sheets for DIY installs 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

**Brand:** allwin
**Price:** € 165.33
**Availability:** ✅ In Stock

## Summary

> 🚗 Silence the noise, tame the heat — drive in ultimate comfort!

## Quick Answers

- **What is this?** 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 by allwin
- **How much does it cost?** € 165.33 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/521423996-car-heat-sound-deadening-insulation-mat-394-mil-10-8)

## Best For

- allwin enthusiasts

## Why This Product

- Trusted allwin brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **All-Weather Durability:** Waterproof, odorless closed-cell foam that withstands -40°F to 300°F without degrading.
- • **Ultimate Thermal Shield:** Blocks 98% of radiant heat to keep your ride cooler in summer and warmer in winter.
- • **Multi-Surface Versatility:** Perfect for hoods, engine compartments, doors, trunks, and more—customize your sound and heat control.
- • **Precision Fit, Effortless Install:** Flexible 40x40 inch sheets cut easily with scissors—no special tools needed.
- • **Professional Grade Sound Deadening:** Significantly reduces engine and road noise for a quieter, more comfortable drive.

## Overview

This 394 mil thick aluminum foil finished sound deadening mat covers 10.8 sqft with flexible, waterproof closed-cell foam that blocks 98% of radiant heat and reduces engine noise. Rated for extreme temperatures from -40°F to 300°F, it’s designed for easy DIY installation on multiple vehicle surfaces, enhancing thermal insulation and soundproofing for a premium driving experience.

## Description

394 mil (10 mm) Car Sound Deadening & Heat Insulation Closed Cell Foam - PE Foam Sound DeadenerStrong sound insulation and absorption performance, heat insulation, Reducing energy consumption with the strong performance of heat insulationStrong self-viscous performance

Review: Honestly, it's a perfectly good mat. Plus, it's rated for high heat - Originally I tried to measure and get the perfect sized mat for my hood, but I ignored the fact that you can cut this with just normal scissors. It's not fiberglass. It's perfectly good quality. In ended up cutting it into squares anyway just to be a little easier to apply. I'm sure you could un-stick it if you needed, but it's not intended to be stuck and unstuck multiple times. This might not work with all cars, but I was able to put this under the factor hood deadener. I just had to poke holes for the clips and push to get them to click in. This wasn't an issue for me, but it shows the product being rolled. Mine actually came folded up. The creases aren't a big deal, but I suppose it might be a problem for some folks. Honestly, it's a perfectly good mat. Plus, it's rated for high heat so I don't have to worry about it melting like butyl.
Review: Good quality - Worked well for under hood insulation. I used plastic rivets to hold it in place and aluminum tape to seal any place that i had to use more than one section.

## Features

- Sound deadening material size: Nominal thickness 394 mils; Total coverage area of 10.8 sqft; Nominal sheet Size 40x40 inches. working Temperature Range: -40°F ~ 300°F
- Heat Insulation and Vibration Deadener: Effectively blocks 98% of radiant heat transfer. Sound deadening mat is a very versatile insulation material with excellent thermal barrier properties that will block engine, exhaust, & summer heat, ensuring your vehicle stays cooler in the summer and warmer in the winter, making your ride more pleasant!
- Automotive self-adhesive insulation is a waterproof lightweight thermal deadener with a highly compressible closed-cell foam formulation, it absolutely doesn’t absorb moisture and has no odor
- The sound dampening mat can be applied to external partitions, firewalls, hoods, engine compartments, engine compartments, trunks, wheel arches, body panels, load floors, and internal partitions under the seat floor.
- The sound dampening material comes in handy size sheets which make it easier in terms of the cutting and installation process and it’s flexible which makes it easy to install with or without a roller.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BNPZZ71X |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #4,049 in Automotive ( See Top 100 in Automotive ) #10 in Automobile Insulation |
| Color | Silver Tone |
| Coverage | 10.8 square foot |
| Customer Reviews | 4.4 4.4 out of 5 stars (587) |
| Date First Available | December 1, 2022 |
| Included Components | Sound deadening mat |
| Item Package Quantity | 1 |
| Item Weight | 15.2 ounces |
| Item model number | AL4040 |
| Manufacturer | ALLWIN |
| Part Number | AL4040 |
| Product Dimensions | 40 x 40 x 0.04 inches |
| Style | 40 x 40"(10.8sqft) |
| UPC | 616943705379 |

## Product Details

- **Brand:** ALLWIN
- **Item Thickness:** 10 Millimeters
- **Material:** 394 Mil
- **Product Dimensions:** 40"L x 40"W

## Images

![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 - Image 1](https://m.media-amazon.com/images/I/6198HbggqtL.jpg)

## Available Options

This product comes in different **Material Type, Style** options.

## Questions & Answers

**Q: Would this work for vibration from a sound system?  Im getting rattling in my doors and hatch part..**
A: Maybe but they have sound deadener for that use.

**Q: How much thickness?**
A: Like it says 197mil/ app 1sixteenth thick

## Customer Reviews

### ⭐⭐⭐⭐⭐ Honestly, it's a perfectly good mat. Plus, it's rated for high heat
*by K***R on March 2, 2026*

Originally I tried to measure and get the perfect sized mat for my hood, but I ignored the fact that you can cut this with just normal scissors. It's not fiberglass. It's perfectly good quality. In ended up cutting it into squares anyway just to be a little easier to apply. I'm sure you could un-stick it if you needed, but it's not intended to be stuck and unstuck multiple times. This might not work with all cars, but I was able to put this under the factor hood deadener. I just had to poke holes for the clips and push to get them to click in. This wasn't an issue for me, but it shows the product being rolled. Mine actually came folded up. The creases aren't a big deal, but I suppose it might be a problem for some folks. Honestly, it's a perfectly good mat. Plus, it's rated for high heat so I don't have to worry about it melting like butyl.

### ⭐⭐⭐⭐⭐ Good quality
*by C***2 on February 16, 2026*

Worked well for under hood insulation. I used plastic rivets to hold it in place and aluminum tape to seal any place that i had to use more than one section.

### ⭐⭐⭐⭐⭐ Stick it up to keep the noise down!
*by D***B on May 9, 2025*

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.

## Frequently Bought Together

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-03-11*