Exterior Components› Weatherstripping and Rubber Details

Siless

Sound Deadening and Heat Insulation Material

$275.95

SKU: SLS15736

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Overview

The Siless Liner is a 157 mil (4mm) thick sound deadening and heat insulation material designed for automotive use. It features a closed-cell PE foam formulation with an aluminum foil finish, offering both thermal insulation and sound dampening properties. This material is waterproof, odorless, and tear-resistant, making it a durable solution for reducing noise and heat inside a vehicle.
Show original supplier description
The Siless Liner is an innovative 2-in-1 product designed to provide effective sound deadening and heat insulation for automotive applications. This liner features a closed-cell PE foam formulation with a layer of aluminum foil, making it an ideal solution for managing both heat and cool air within the cabin. Its advanced formulation is lightweight, waterproof, odorless, and tear-resistant, ensuring durability and a clean installation. The material's closed-cell structure prevents moisture absorption and won't promote rust, unlike some traditional padding materials. With a thickness of 157 mil (4mm), this liner offers substantial thermal insulation, operating effectively up to 215 degrees Fahrenheit. It provides near-zero air infiltration due to its tightly packed cells, which is key to its ability to reduce heat transfer. The product comes with 153 sqft of coverage, offering ample material for various applications within a vehicle. This Siless Liner is positioned as a cost-effective solution, priced significantly lower than comparable products on the market, making professional soundproofing more accessible. It is recommended for use on top of other sound deadening mats, such as the Siless Vibro Sound Deadening Mat, to create a comprehensive sound and thermal management system for your vehicle.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandSiless
Part NumberSLS15736
CategoryExterior Components
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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