---
product_id: 512334059
title: "Sound Deadening Mat 157mil(4 mm) 18sqft - Closed Cell Foam Car Sound Deadening Material - Self-Adhesive Hood Insulation Heat Shield Auto Sound Dampening"
brand: "aggsound"
price: "$149"
currency: NZD
in_stock: true
reviews_count: 13
category: "Agg Sound"
url: https://www.desertcart.nz/products/512334059-sound-deadening-mat-157mil-4-mm-18sqft-closed-cell-foam
store_origin: NZ
region: New Zealand
---

# 98% heat transfer reduction 4mm dense closed-cell foam self-adhesive, easy install Sound Deadening Mat 157mil(4 mm) 18sqft - Closed Cell Foam Car Sound Deadening Material - Self-Adhesive Hood Insulation Heat Shield Auto Sound Dampening

**Brand:** aggsound
**Price:** $149
**Availability:** ✅ In Stock

## Summary

> 🔇 Silence the noise, feel the difference — your ride’s new best-kept secret.

## Quick Answers

- **What is this?** Sound Deadening Mat 157mil(4 mm) 18sqft - Closed Cell Foam Car Sound Deadening Material - Self-Adhesive Hood Insulation Heat Shield Auto Sound Dampening by aggsound
- **How much does it cost?** $149 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/512334059-sound-deadening-mat-157mil-4-mm-18sqft-closed-cell-foam)

## 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

- • **Durability That Lasts:** Anti-extrusion foam resists collapse and tearing, ensuring long-term performance without compromise.
- • **Effortless Installation:** Peel, stick, and seal in just five simple steps—perfectly fits doors, hoods, trunks, and more.
- • **Tailored Thickness Options:** Choose from multiple thicknesses (4mm to 1 inch) to customize your sound and heat insulation needs.
- • **Heat Blocker Extraordinaire:** Slash heat transfer by 98%, keeping your vehicle cooler and more comfortable on every drive.
- • **Triple-Layered Sound Shield:** Experience premium noise and heat insulation with 4mm high-density closed-cell foam backed by industrial-grade adhesive.

## Overview

AggSound’s 4mm Sound Deadening Mat combines high-density closed-cell foam with a powerful adhesive backing to deliver superior automotive sound and heat insulation. Designed for easy installation across multiple vehicle parts, it reduces heat transfer by 98% and dampens unwanted noise and vibrations, ensuring a quieter, cooler, and more comfortable driving experience.

## Description

Buy AggSound Sound Deadening Mat 157mil(4 mm) 18sqft - 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: 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.
Review: Expensive but works like nothing else. - Expensive but works like nothing else. Sure deadens sound on cab of ice cream truck. If you brush against it too hard it could tear or chip off but otherwise very durable. One inch thick and soft as a mat.

## Features

- [4mm High Quality Closed Cell Foam, Provide Better Sound & Heat Insulation] Our automotive sound deadener is composed of three layers of high quality material, including 4mm high density closed cell foam, high quality back glue and back paper.
- [Superior Noise and Heat Insulation] 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.
- [High-quality Material, Meet the Needs of Longer & Better Use] 4mm 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. 4mm 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.
- [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 | B0BNBTSG36 |
| Best Sellers Rank | #2,794 in Automotive ( See Top 100 in Automotive ) #5 in Automobile Insulation |
| Brand | AggSound |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,674) |
| Date First Available | November 25, 2022 |
| Item Weight | 1.54 pounds |
| Item model number | YY04PM |
| Manufacturer | AggSound |
| Manufacturer Part Number | YY04PM18 |
| Model | 01 |
| Product Dimensions | 17.32 x 6.3 x 6.3 inches |

## Product Details

- **Brand:** AggSound
- **Item Thickness:** 0.16 Inches
- **Manufacturer:** AggSound
- **Material:** 157mil-Closed Cell Foam
- **Product Dimensions:** 165.3"L x 15.7"W

## Images

![Sound Deadening Mat 157mil(4 mm) 18sqft - 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/71Nb3q3heoL.jpg)

## Available Options

This product comes in different **Material Type** 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

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ Expensive but works like nothing else.
*by L***T on December 22, 2025*

Expensive but works like nothing else. Sure deadens sound on cab of ice cream truck. If you brush against it too hard it could tear or chip off but otherwise very durable. One inch thick and soft as a mat.

### ⭐⭐⭐⭐ 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!

## Frequently Bought Together

- AggSound 157mil 18sqft Roll Pack Universal Sound Deadener for Cars with Aluminum Foil Tape&Car Trim Removal Tool-Closed Cell Foam Noise Deadening Material-Heat Shield Insulation Dampening Mat
- LUMITECO Bearings Equipped Automotive Car Audio Sound Deadening Application Wheel Roller, Heat Abatement Mat Wallpaper Application PU Smoothing Tool Seam Roller
- Amazon Basics Car Sound Deadener, 14.5″ x 10″, (10 count)Pack of 1

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**Shop now:** [https://www.desertcart.nz/products/512334059-sound-deadening-mat-157mil-4-mm-18sqft-closed-cell-foam](https://www.desertcart.nz/products/512334059-sound-deadening-mat-157mil-4-mm-18sqft-closed-cell-foam)

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-16*