Mass Noise Liner

Car Builders Mass Noise Liner is a 12mm thick, heavyweight, acoustic barrier. This product is used over the top of sound deadening (stage 1) which is applied directly onto the sheet metal. Sound deadening stops noise created by panel vibration whereas Mass Noise Liner (stage 2) reduces airborne noise generated from the engine, road etc. This premium carpet underlay is an OEM product used in high-end luxury vehicles. Mass Noise Liner replaces cotton jute or shoddy, creating far superior sound proofing results.

Construction
2mm Mass Loaded vinyl upper layer, coupled with a 10mm closed cell foam to create the most effective means of acoustic blocking. Our flexible closed cell foam is water resistant and offers superior thermal insulation.
 

Features/Advantages

• Heavy duty sound blocking
• Water resistant 
• Removable
• Cuts with scissors and knife
• Reduces heat transfer
• Does not rot or deteriorate

Applications

• Firewalls
• Cargo areas
• Van floors
• Boot floors

It is not 100% necessary to put Stage 1 Sound Deadener underneath Mass Noise Liner on cargo area floors or van floors due to the metal already being fairly rigid from the ribs. The Mass Noise Liner will be an effective floor sound proofing by itself. 

 

Ideal for:

• 4WD's and muscle cars - firewall barrier to reduce engine noise
• Trucks - reduce engine noise and heat on floors and firewalls, great for serviceability
• Exhaust drone - drop in as a boot liner to reduce exhaust drone particular common in 6s, V8s and flat fours.
• Engine rooms, compressors etc

 

Note: due to the weight of our Mass Noise Liner it is not recommended for use on the underside of horizontal surfaces. For these applications you should use our light weight foam such as Acoustic Liner, Water proof carpet underlay, Under bonnet insulation or our 6mm Insul-layer.

 

 

 

Why is Mass Noise Liner so popular as an underlay in 4x4 vehicles?
In 4x4 applications, Mass Noise Liner stands out thanks to its rugged build and water resistance. The closed cell foam backing doesn’t absorb water, making it perfect for off-road adventures and river crossings. If the cabin floods, the liner can be removed, the floor cleaned, and the liner reinstalled without damage. It combines superior acoustic performance with real-world durability for serious 4WD owners.

What is Car Builders Mass Noise Liner used for?
Car Builders Mass Noise Liner is a premium automotive underlay designed to reduce airborne noise in vehicles. Commonly used in 4WDs, vans, trucks, and muscle cars, it blocks engine, road, and exhaust noise, offering a quieter, more comfortable cabin experience. It's ideal for anyone upgrading their vehicle’s soundproofing or replacing outdated jute or shoddy insulation with a high-performance solution.

How is Mass Noise Liner different from sound deadening?
Sound deadening, or Stage 1 insulation, is applied directly to metal panels to stop vibration-based noise. Mass Noise Liner, or Stage 2 insulation, sits over sound deadener and is engineered to block airborne noise using a dense 2mm mass loaded vinyl layer bonded to a 10mm closed cell foam. Together, they form a complete car soundproofing system with both vibration and airborne noise control.

Is it necessary to use sound deadener underneath Mass Noise Liner?
Using sound deadener underneath Mass Noise Liner maximises noise reduction, but it's not essential in every case. On rigid surfaces like ribbed van or cargo floors, Mass Noise Liner can perform effectively on its own as an automotive floor soundproofing solution. For the best results in cabins and firewalls, pairing both layers is recommended.

Where can I install Car Builders Mass Noise Liner in my vehicle?
Mass Noise Liner is versatile and can be installed in multiple areas of your car or truck, including firewalls, cargo floors, van interiors, boot spaces, engine rooms, and around compressors. It's ideal for noise control in performance vehicles, off-road 4WDs, commercial trucks, and vans that need durable and removable sound insulation.

Can I use Mass Noise Liner on car roofs or under horizontal panels?
Due to its heavyweight construction, Mass Noise Liner is not suitable for use on the underside of horizontal or overhead surfaces like car roofs or bonnets. For these areas, use lighter materials such as Car Builders Acoustic Liner, Waterproof Carpet Underlay, Under Bonnet Insulation, or the 6mm Insul-Layer to maintain performance without sagging.

Is Car Builders Mass Noise Liner water resistant?
Yes, Mass Noise Liner features a closed cell foam base that is fully water resistant and non-absorbent. This makes it ideal for use in vehicles exposed to moisture, such as 4WDs and vans. Unlike traditional insulation materials, it won’t rot, deteriorate, or develop mould, even after exposure to water.

Does Mass Noise Liner provide thermal insulation for vehicles?
Mass Noise Liner is not only a powerful acoustic barrier, but it also provides effective thermal insulation. The 10mm closed cell foam layer reduces heat transfer from engine bays, transmissions, and road surfaces, helping to keep the interior cooler in summer and warmer in winter.

Is Mass Noise Liner easy to install and remove?
Yes, this product is designed with DIY and professional installers in mind. It can be easily cut with scissors or a utility knife, shaped to fit complex contours, and removed when needed for cleaning or service. This makes it an ideal drop-in solution for boot liners, cargo floors, and interior firewall applications.

What is Car Builders Mass Noise Liner made of?
This high-performance vehicle underlay features a dual-layer construction: a 2mm mass loaded vinyl top layer for blocking sound and a 10mm closed cell foam base for thermal insulation and moisture resistance. This combination makes it one of the most effective car noise insulation materials on the market.

Which vehicles benefit most from installing Mass Noise Liner?
Mass Noise Liner is ideal for a range of vehicle types including 4WDs, muscle cars, trucks, vans, and classic cars. Whether you're looking to reduce engine drone, quiet down a loud exhaust, or create a more refined cabin space, this product enhances both comfort and performance.