---
product_id: 634863049
title: "Sound Deadening Mat 3/4inch(20 mm) 6.54sqft - Closed Cell Foam Car Sound Deadening Material - Self-Adhesive Hood Insulation Heat Shield Auto Sound Dampening"
brand: "aggsound"
price: "$141.95"
currency: USD
in_stock: true
reviews_count: 13
category: "Agg Sound"
url: https://www.desertcart.us/products/634863049-sound-deadening-mat-3-4inch-20-mm-6-54sqft-closed
store_origin: US
region: United States of America
---

# reduces 98% heat transfer 20mm thick closed cell foam self-adhesive, easy 5-step install Sound Deadening Mat 3/4inch(20 mm) 6.54sqft - Closed Cell Foam Car Sound Deadening Material - Self-Adhesive Hood Insulation Heat Shield Auto Sound Dampening

**Brand:** aggsound
**Price:** $141.95
**Availability:** ✅ In Stock

## Summary

> 🔇 Silence the noise, shield the heat — upgrade your ride’s comfort game!

## Quick Answers

- **What is this?** Sound Deadening Mat 3/4inch(20 mm) 6.54sqft - Closed Cell Foam Car Sound Deadening Material - Self-Adhesive Hood Insulation Heat Shield Auto Sound Dampening by aggsound
- **How much does it cost?** $141.95 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/634863049-sound-deadening-mat-3-4inch-20-mm-6-54sqft-closed)

## Best For

- aggsound enthusiasts

## Why This Product

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

## Key Features

- • **98% Heat Transfer Reduction:** Keep your engine bay cooler and cabin quieter, enhancing comfort and vehicle longevity.
- • **Premium 20mm Closed Cell Foam:** Experience superior noise and heat insulation with high-density foam that outperforms standard mats.
- • **Durable & Anti-Extrusion Design:** Built to resist compression and wear, maintaining performance over time even under harsh conditions.
- • **Industrial-Grade Adhesive Backing:** Stick it once, stick it right—strong adhesion ensures a secure fit without peeling or sagging.
- • **Universal Fit for Multiple Applications:** Perfect for doors, hoods, trunks, floors, and firewall—customize your ride’s soundproofing effortlessly.

## Overview

AggSound’s 3/4 inch (20mm) Sound Deadening Mat delivers professional-grade sound and heat insulation with a high-density closed cell foam core, backed by a powerful adhesive for easy installation. Covering 6.54 sqft per roll, it reduces heat transfer by 98% and dampens vibrations, making it ideal for automotive applications like hoods, doors, and trunks. Engineered for durability and universal fit, this mat transforms your vehicle into a quieter, cooler sanctuary.

## Description

Buy AggSound Sound Deadening Mat 3/4inch(20 mm) 6.54sqft - Closed Cell Foam Car Sound Deadening Material - Self-Adhesive Hood Insulation Heat Shield Auto Sound Dampening: Insulation - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Easy to use and did the job! - This worked perfectly to patch under hood insulation that was shredded by a squirrel. I just needed a small amount and this was a reasonable solution.
Review: As described, very sticky backing.. - Very sticky backing. Once it down ,its down. Good sound barrier, and help the vibration of the gas tank I carry on the truck.

## Features

- [1/2 Inch High Quality Closed Cell Foam, Provide Better Sound & Heat Insulation] Our automotive sound deadener is composed of three layers of high quality material, including 1/2 inch high density closed cell foam, high quality back glue and back paper. It provides better noise insulation effect for your car so you can enjoy a more quiet and comfortable environment. At the same time, it effectively reduces 98% heat transfer. Product include: 16*60inch mat*1roll, total coverage area 6sqft.
- [High-quality Material, Meet the Needs of Longer & Better Use] 1/2 inch high quality closed cell foam has a higher anti-extrusion function compared with inferior foam product, so there is no need to worry about the collapse of the use process. Excellent adhesive has strong viscosity, which can ensure to stick firmly. High quality back paper is easy to to peel & install and not easy to tear.
- [Easy to Install, Wide Application] Aggsound heat shied pad is convenient in installation and operation. Just five steps can be completed: disassemble-clean-cute-paste-reinstallate. 13mm unviersal thickness is more suitable for the car door, hood, trunk, floor, firewall and other parts of the vehicle. You do not have to worry about the phenomenon of not being able to install because the thickness is too large but the vehicle gap is not enough.
- [Wide range of application]This sound and heat insulation material can be used in floor carpet backing, handicrafts, anti-vibration padding, furniture, to play a cushioning or sound and heat insulation effect.
- [A variety of different thicknesses to meet different needs] Aggsound offers a variety of different thicknesses of insulation foam 4mm/6mm/8mm/10mm/0.25inch/0.5inch/1inch etc.. Different thicknesses of insulation foam to meet the different needs of the application.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CPXM4VD4 |
| Best Sellers Rank | #2,862 in Automotive ( See Top 100 in Automotive ) #6 in Automobile Insulation |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,705) |
| Date First Available | December 11, 2023 |
| Item Weight | 1.05 pounds |
| Item model number | YY20PM06 |
| Manufacturer | AggSound |
| Manufacturer Part Number | YY20PM06 |
| Model | 07 |
| Product Dimensions | 17.32 x 9.06 x 6.3 inches |

## Product Details

- **Brand:** AggSound
- **Item Thickness:** 0.5 Inches
- **Material:** Foam
- **Product Dimensions:** 60"L x 16"W
- **Recommended Uses For Product:** Automotive insulation, Marine insulation, Recreational vehicle insulation

## Images

![Sound Deadening Mat 3/4inch(20 mm) 6.54sqft - Closed Cell Foam Car Sound Deadening Material - Self-Adhesive Hood Insulation Heat Shield Auto Sound Dampening - Image 1](https://m.media-amazon.com/images/I/81Mxh4XuSkL.jpg)
![Sound Deadening Mat 3/4inch(20 mm) 6.54sqft - Closed Cell Foam Car Sound Deadening Material - Self-Adhesive Hood Insulation Heat Shield Auto Sound Dampening - Image 2](https://m.media-amazon.com/images/I/81JzM8cNUuL.jpg)
![Sound Deadening Mat 3/4inch(20 mm) 6.54sqft - Closed Cell Foam Car Sound Deadening Material - Self-Adhesive Hood Insulation Heat Shield Auto Sound Dampening - Image 3](https://m.media-amazon.com/images/I/71FEECYuSrL.jpg)
![Sound Deadening Mat 3/4inch(20 mm) 6.54sqft - Closed Cell Foam Car Sound Deadening Material - Self-Adhesive Hood Insulation Heat Shield Auto Sound Dampening - Image 4](https://m.media-amazon.com/images/I/71Vn7iWO-BL.jpg)
![Sound Deadening Mat 3/4inch(20 mm) 6.54sqft - Closed Cell Foam Car Sound Deadening Material - Self-Adhesive Hood Insulation Heat Shield Auto Sound Dampening - Image 5](https://m.media-amazon.com/images/I/71C55HvwUwL.jpg)

## Available Options

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

## Questions & Answers

**Q: Does it come with installation instructions? What's the best way to install it for maximum results?**
A: 1.Remove & Clean: Take off interior panels; clean and dry surfaces 2.Cut to Fit: Pre-cut insulation for doors, floor, and roof 3.Apply & Seal: Peel, stick, then seal seams with foil tape (sold separately) 4.Reinstall: Replace all interior components

**Q: What's the difference between Aluminum Foil and Closed-cell Foam?What are the best sound deadening solutions for sound?**
A: 394mil Aluminum Foil excels in heat blocking. 157mil Closed-cell Foam (higher density) is better for soundproofing. For best results: combine 157mil foam with Butyl Sound Deadener (sold separately) to kill vibration and block noise effectively.

**Q: How do I properly install the Butyl + 157mil High-Density Closed-cell Foam combination?**
A: 1. Remove, Clean & Cut. 2. Apply butyl sheets(50–60% coverage is optimal), damping vibration, reducing low-frequency noise. 3. Install foam over butyl. Effectively blocks mid-high frequency noise. 4. Check. This combo ensures optimal noise reduction.

**Q: How do sound deadening materials work to reduce noise? Can it reduce road noise? Can it be used on car doors?**
A: Yes, Closed-cell Foam reduces road noise through:1.Sound absorption (energy to heat conversion) 2.Acoustic impedance reflection 3.Mass law blocking of mid-high frequencies. Its structure effectively reduces road/wind noise transmission into cabin.

**Q: Does it require any special tools for the installation? Is a roller necessary?**
A: Basic tools: gloves, utility knife, measuring tape. A roller (sold separately) is highly recommended to ensure proper adhesion of butyl/foam. Aluminum foil tape is essential for sealing seams. Keeping surfaces clean is crucial for optimal results.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Easy to use and did the job!
*by L***B on February 10, 2026*

This worked perfectly to patch under hood insulation that was shredded by a squirrel. I just needed a small amount and this was a reasonable solution.

### ⭐⭐⭐⭐⭐ As described, very sticky backing..
*by C***. on January 10, 2026*

Very sticky backing. Once it down ,its down. Good sound barrier, and help the vibration of the gas tank I carry on the truck.

### ⭐⭐⭐⭐ Good, with some things to note...
*by N***L on October 20, 2025*

Works decently enough. A few things to note. It tears quite easily. It sticks to your fingers and will tear if you are not careful when tryin to remove. Once its stuck, its stuck. It will be messy to remove if needed. It looks a little like neoprene as some suggest it is, but it is not. Just a basic low grade closed cell foam. It does the job for sound insulating though!

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.us/products/634863049-sound-deadening-mat-3-4inch-20-mm-6-54sqft-closed](https://www.desertcart.us/products/634863049-sound-deadening-mat-3-4inch-20-mm-6-54sqft-closed)

---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-03*