Siless Liner 157 4mm Closed-Cell PE Foam Sound Deadener Roll — 36 sq ft, Self-Adhesive Heat Insulation

Siless Liner 157 is a 4 mm closed-cell polyethylene foam roll with self-adhesive backing that reduces vibration and blocks radiant heat across 36 square feet.

Designed for automotive and general thermal-vibration control, this Siless mat combines a waterproof, oil-resistant closed-cell foam with a peel-and-stick adhesive layer to offer a lightweight, flexible barrier against heat, noise and moisture. Each roll measures approximately 15.74 x 330.7 inches and covers 36 sq ft, providing an affordable option for improving cabin comfort, insulating engine bays, trunks, doors, or body panels without adding excessive weight.

How does Siless Liner 157 help reduce heat inside a vehicle?

The closed-cell PE foam reflects and blocks a large portion of radiant heat, lowering temperature transfer from engine areas, exhaust tunnels, and hot body panels. It’s engineered to resist heat up to typical rubber-foam operating ranges, helping interior surfaces stay cooler during warm weather and reducing heat soak.

• Blocks up to 98% of radiant heat transfer in controlled setups
• 4 mm thickness balances thermal resistance with flexibility
• Closed-cell structure resists moisture and prevents heat-conductive absorption

Will this mat improve sound and reduce vibration?

Yes — Siless Liner 157 acts as a vibration deadener by decoupling sheet metal and dampening resonances that create rattles and mid-frequency noise. While not a heavy mass-loaded material, it provides noticeable reduction in panel buzz and helps other sound-deadening layers perform better when used together.

• Adhesive-backed foam adheres to panels to reduce flex-induced noise
• Closed-cell foam formulation absorbs impact and reduces panel vibration
• Can be layered with denser products for improved low-frequency control

How easy is installation and what surfaces does it stick to?

Installation is straightforward: cut to size, peel the liner’s release film, and press the adhesive side onto clean, dry metal or composite surfaces. The material is lightweight, flexible, and can be installed without a roller, although a roller ensures better adhesion and eliminates trapped air pockets.

• Self-adhesive backing for quick peel-and-stick application
• Flexible 4 mm foam conforms to contours, corners, and seams
• Works on doors, floors, trunks, engine bay dress panels, and interior skins

How durable is Siless Liner 157 and what are its environmental resistances?

Fabricated from closed-cell polyethylene, the liner is waterproof, oil-resistant, and does not absorb moisture or emit odors. It tolerates normal automotive temperature ranges and maintains mechanical stability, making it suitable for long-term use in both interior and semi-exposed compartments.

• Closed-cell foam prevents water absorption and inhibits mold
• Oil-resistant surface keeps bonding reliable in automotive environments
• Rated to perform within typical rubber-foam temperature ranges, maintaining flexibility

Who is this for? Siless Liner 157 is aimed at DIY car owners, custom installers, and small shops seeking an economical, lightweight thermal and vibration control layer. It’s ideal for people who want to reduce heat transfer and mid-frequency noise without adding heavy mass, or who need a waterproof, compressible insulation that’s easy to trim and apply across large surface areas.