---
product_id: 160827900
title: "Liner 314 mil 18 sqft Sound Deadening mat - Sound Deadener Mat - Car Sound Dampening Material - Sound dampener - Sound deadening Material Sound Insulation - Car Sound deadening"
brand: "siless"
price: "$123.91"
currency: USD
in_stock: true
reviews_count: 8
url: https://www.desertcart.us/products/160827900-liner-314-mil-18-sqft-sound-deadening-mat-sound-deadener
store_origin: US
region: United States of America
---

# 100% waterproof closed-cell foam 314 mil (8mm) thick for max insulation 98% radiant heat blocked Liner 314 mil 18 sqft Sound Deadening mat - Sound Deadener Mat - Car Sound Dampening Material - Sound dampener - Sound deadening Material Sound Insulation - Car Sound deadening

**Brand:** siless
**Price:** $123.91
**Availability:** ✅ In Stock

## Summary

> 🚗 Silence & Comfort, Engineered to Elevate Your Drive

## Quick Answers

- **What is this?** Liner 314 mil 18 sqft Sound Deadening mat - Sound Deadener Mat - Car Sound Dampening Material - Sound dampener - Sound deadening Material Sound Insulation - Car Sound deadening by siless
- **How much does it cost?** $123.91 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/160827900-liner-314-mil-18-sqft-sound-deadening-mat-sound-deadener)

## Best For

- siless enthusiasts

## Why This Product

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

## Key Features

- • **Waterproof & Odorless:** Closed-cell polyethylene foam that resists moisture and stays fresh
- • **Effortless Installation:** Self-adhesive backing and flexible foam make DIY fitting a breeze
- • **Lightweight Yet Durable:** High compressibility with rubber-foam-level heat tolerance up to 215°F
- • **Ultimate Thermal Shield:** Blocks 98% of radiant heat to keep your ride cool or cozy year-round
- • **Cost-Effective Premium Quality:** Get top-tier sound and heat insulation at a fraction of competitor prices

## Overview

The Siless Liner 314 mil Sound Deadening Mat offers 18 sqft of premium closed-cell polyethylene foam insulation with a self-adhesive backing. It blocks 98% of radiant heat, is fully waterproof, odorless, and flexible for easy installation. At 8mm thickness and heat tolerance up to 215°F, it delivers superior sound dampening and thermal insulation at over three times less cost than comparable products.

## Description

Full description not available

## Features

- Closed Cell Foam: OIL and Waterproof LINER closed-cell polyethylene foam is the best for car, Siless with an adhesive layer 100% ensures optimum efficiency and thermal insulation that could be possibly gained. The price of 1 sqft of Siless Liner with similar characteristics is more then three times cheaper! Excellent quality for less money!!
- Heat Blocker and Sound Deadener: Effectively blocks 98% of radiant heat transfer. Siless Liner is a very versatile insulation material with excellent thermal barrier properties that will block engine, exhaust, & summer heat, ensure your vehicle stays cooler in the summer and warmer in the winter, making your ride more pleasant!
- Lightweight, Waterproof: It is a waterproof light-weight thermal deadener with highly compressible closed cell foam formulation, it absolutely doesn’t absorb moisture and has no odor, and it’s flexible which make it easy to install with or without roller.
- The operating temperature of the material is the same as of the rubber foam up to 215 degrees Fahrenheit.
- SILESS Liner specifications: Self-adhesive foam rolls (closed cell PE foam) with waterproof glue. Thickness 314 mil / 0.314 inches / 8mm. Number of rolls in the package - 1. Total coverage area - 18 ft². Each roll size - 15.74 x 165.35 inches.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Bema Group Inc. |
| UPC | 670875990746 |
| Part Number | SLL31418 |
| Item Weight | 1.96 pounds |
| Product Dimensions | 165.35 x 15.74 x 0.04 inches |
| Item model number | SLL31418 |
| Is Discontinued By Manufacturer | No |
| Size | 18 sqft |
| Color | Black |
| Style | 314 mil 18 SqFt |
| Item Package Quantity | 1 |
| Coverage | 18 square feet |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Material:** 314 mil Closed Cell Foam
- **Brand:** Siless
- **Item Thickness:** 0.31 Inches
- **Recommended Uses For Product:** Thermal insulation and sound deadening in cars
- **Product Dimensions:** 165.35"L x 15.74"W

## Images

![Liner 314 mil 18 sqft Sound Deadening mat - Sound Deadener Mat - Car Sound Dampening Material - Sound dampener - Sound deadening Material Sound Insulation - Car Sound deadening - Image 1](https://m.media-amazon.com/images/I/91PKvKKpe2S.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Exactly what i needed!
*by S***N on May 8, 2025*

I recently purchased the Siless Liner 314 mil 18 sqft Sound Deadening mat and I am absolutely thrilled with the results. This product is a game-changer when it comes to reducing noise and improving the overall sound quality in my vehicle. The 314 mil thickness provides excellent sound insulation, effectively blocking out road noise, engine noise, and vibrations.One of the things that really impressed me about the Siless Liner is the price. Compared to other sound deadening products on the market, this one is incredibly affordable. I was a bit skeptical at first because of the low price, but after installing it in my car, I can confidently say that it is worth every penny. The quality of the material is top-notch, and it is easy to work with during the installation process.Not only does the Siless Liner effectively reduce noise, but it also helps to improve the overall sound quality in my vehicle. The sound deadening material creates a more acoustically pleasing environment, allowing me to enjoy my music and conversations without any distractions. I have noticed a significant difference in the clarity and depth of the sound in my car since installing the Siless Liner.Overall, I highly recommend the Siless Liner 314 mil 18 sqft Sound Deadening mat to anyone looking to improve the sound quality in their vehicle. It is a cost-effective solution that delivers exceptional results. Don't let the affordable price tag fool you - this product is a game-changer when it comes to reducing noise and enhancing the overall driving experience.

### ⭐⭐⭐⭐⭐ Silencio y Confort Insuperables! Transformación Total.
*by F***Z on May 27, 2025*

He utilizado la alfombrilla Siless Liner para insonorizar mi coche y estoy absolutamente maravillado con la diferencia. La instalación fue sorprendentemente sencilla gracias a su flexibilidad y adhesivo potente. El grosor de 0.15 pulgadas puede parecer poco, pero el impacto en la reducción del ruido de la carretera, las vibraciones y el calor es drástico. Ahora los viajes son mucho más silenciosos y placenteros, y el sistema de sonido se escucha con una claridad increíble. Es un producto de una calidad excepcional que realmente cumple lo que promete. ¡La mejor mejora que le he hecho a mi vehículo!

### ⭐⭐⭐⭐⭐ I was surprised
*by C***M on May 28, 2025*

The peel-n-stick is super nice. It's sticky and doesn't let off your fingers easily so be ready to stick it and leave it - there's no redo. I am a little disappointed that there's lifting after-the-fact. But that's a very small point as 99% of this product is amazing!The ride is quieter and I'm happy with the overall everything of this product.

## Frequently Bought Together

- Siless Liner 314 mil 18 sqft Sound Deadening mat - Sound Deadener Mat - Car Sound Dampening Material - Sound dampener - Sound deadening Material Sound Insulation - Car Sound deadening
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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-14*