---
product_id: 609454666
title: "AggSound 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: "₨48895"
currency: LKR
in_stock: true
reviews_count: 5
category: "Agg Sound"
url: https://www.desertcart.lk/products/609454666-aggsound-sound-deadening-mat-157mil-4-mm-18sqft-closed-cell
store_origin: LK
region: Sri Lanka
---

# 98% heat transfer reduction 4mm dense closed-cell foam Self-adhesive, easy 5-step install AggSound 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:** ₨48895
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** AggSound 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?** ₨48895 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/609454666-aggsound-sound-deadening-mat-157mil-4-mm-18sqft-closed-cell)

## 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

- • **Cut Heat by 98%:** Keep your engine bay cooler and cabin quieter with industry-leading thermal resistance.
- • **Versatile Thickness Options:** Choose from 4mm to 1 inch to customize your soundproofing and heat shield needs.
- • **Premium 4mm Closed-Cell Foam:** High-density foam ensures superior noise and heat insulation without compression.
- • **Strong Self-Adhesive Backing:** Peel-and-stick design guarantees a firm, lasting bond on multiple vehicle surfaces.
- • **Universal Fit for Every Ride:** Perfect thickness for doors, hoods, trunks, floors, and firewalls—no gap worries.

## Overview

AggSound Sound Deadening Mat is a premium 4mm thick closed-cell foam mat designed for automotive noise and heat insulation. Featuring a triple-layer construction with high-density foam, strong adhesive backing, and easy peel-off paper, it reduces heat transfer by 98% and significantly dampens sound. Its universal thickness fits various vehicle parts, making installation quick and effective for a quieter, cooler driving experience.

## Description

Sound Deadener for Cars-Auto Closed Cell Foam Noise Deadening Material-Heat Shield Insulation Dampening Mat

Review: Good quality
Review: Tunn, mycket bra till trånga utrymmen

## 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 | #305,477 in Car & Motorbike ( See Top 100 in Car & Motorbike ) #314 in Automobile Insulation |
| Country of Origin | USA |
| Generic Name | Heat Shield Insulation Dampening Mat |
| Included Components | Heat Shield Insulation Dampening Mat |
| Item Dimensions LxWxH | 44 x 16 x 16 Centimeters |
| Item Weight | 739 g |
| Item model number | YY04PM |
| Manufacturer | AggSound |
| Net Quantity | 18.0 Square Feet |
| Product Dimensions | 44 x 16 x 16 cm; 739 g |

## Product Details

- **Brand:** AggSound
- **Item Thickness:** 0.16 Inches
- **Material:** 157mil-Closed Cell Foam
- **Product Dimensions:** 4.2L x 0.4W Meters
- **Recommended Uses For Product:** Sound insulation and heat reduction in vehicles

## Images

![AggSound 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/41nsqazUivL.jpg)
![AggSound Sound Deadening Mat 157mil(4 mm) 18sqft - 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/41wsfLuphtL.jpg)
![AggSound Sound Deadening Mat 157mil(4 mm) 18sqft - 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/514x-t18CNL.jpg)
![AggSound Sound Deadening Mat 157mil(4 mm) 18sqft - 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/5163ylLdXmL.jpg)
![AggSound Sound Deadening Mat 157mil(4 mm) 18sqft - 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/51FnA0kotmL.jpg)

## 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

### ⭐⭐⭐⭐ Review
*by T***S on 7 December 2025*

Good quality

### ⭐⭐⭐⭐⭐ Review
*by S***. on 14 April 2025*

Tunn, mycket bra till trånga utrymmen

### ⭐⭐⭐⭐⭐ Review
*by D***O on 1 May 2025*

Con el rollo de 1,67m², me ha dado para aislar bastante un Peugeot 206. Pude hacerle pasos de rueda, puertas y parte del maletero, y la mejora es muy notable. No lo ha dejado silencioso, pero porque ni he hecho todo el coche, ni soy profesional y porque en general y por construcción del vehiculo va a haber ruido en el habitáculo. Pero realmente es mucho menos, antes en una nacional a 90 ya hablaba casi gritando, y ahora puedo mantener un tono normal. Fácil de instalar, solo hace falta tiempo que dedicarle al asunto en un sitio para hacerlo tranquilamente

## 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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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-03-10*