Soundown

Soundown Sound-Stop Foam Panel with 1 lb Barrier Layer

Item: #883621 | Part Number: Not Selected
$112.99 - $152.99
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        $112.99 - $152.99
        Need Help? Speak to an Outfitting Specialist [email protected] 1-800-628-8225 MON-FRI 9AM-5:30PM SAT 9AM-3PM
        Description

        The Soundown Sound-Stop Foam Panel with 1lb Barrier Layer delivers top-tier noise reduction for marine and engine spaces. Combining acoustic foam with a high-density vinyl barrier, it blocks and absorbs sound while adding thermal insulation. Ideal for diesel engines and staterooms, it cuts noise transmission without harmful lead materials.

        Image of : Soundown Sound-Stop Foam Panel with 1 lb Barrier Layer Soundown Sound-Stop Foam Panel with 1 lb Barrier Layer Item # 883621

        Description

        Sound-Stop Acoustic Absorption Materials will reduce noise level and provide thermal insulation when applied to hull walls, inside stateroom bulkhead walls, engine compartments.

        This is Noise Reduction Enterprises' top-of-the line material. When people used to make this sound proofing material by hand, they would use a layer of lead sandwitched between the acoustical foam. However, advances in acoustical technology have created a lead-free sound barrier that works as well as lead, yet causes less harm to the environment. It is ideal for large diesel engines, and will quiet the loudest gasoline engine. It is also appropriate for those who want that extra amout of sound reduction.

        Features:

        • Board Dimensions: 32" x 54"
        • Laminated to form a durable surface unaffected by dirt, moisture, lubricants and fuels
        • Composite of acoustic grade polyester urethane foam, with high density vinyl barrier
        • Protective facing of 1 mil. Heat reflective aluminized Mylar film
        • Sound-stop will reduce noise levels by minimizing noise reverberation
        • Sound-stop has a 1 lb. Per sq. Ft. Mass barrier, which yields at least 19 db stc rating for noise transmission loss
        • Provides a thermal insulation margin
        • 1/2" thick Sound-stop can be used as a carpet underlayment.

        Note: Sound-stop should be applied on enclosure walls and ceiling but should not touch engine.

        Installation Instructions

        Data Sheet

        Part Numbers for Soundown Sound-Stop Foam Panel with 1 lb Barrier Layer

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        Reviews

        Rated 5 out of 5 by from Excellent Product! Easy to install! Works great! Screwed it into the roof of my engine compartment with self drilling screws and 1.5" stainless washers. Finished the edges with the Soundown tape. Worked great! Dropped engine noise from 60db to 40db in the salon with the engines at 50% RPM. GREAT!
        Date published: 2024-07-18
        Rated 4 out of 5 by from Would buy again, after further research. Worked as advertised, however..... The box the product came in indicated a large variety of Soundown types available for various motor applications such as diesel or gas motors. I would have chosen another item for my application. However.... It works pretty well as it is.
        Date published: 2025-08-25
        Rated 4 out of 5 by from works good Expensive but works good to insulate the exhaust stack compartment on a commercial fishing vessel.
        Date published: 2024-07-25
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        Questions

        Can it be cut to the needed size?

        Asked by: Aaron
        Yes the material can be cut to size 
        Answered by: Perm
        Date published: 2025-02-21

        Does it have adhesive on it?

        Asked by: Gpalm
        No, the adhesive is purchased separately. Defender item # 883618 is for the spray adhesive or you would need to buy a kit
        Answered by: Dee D
        Date published: 2024-04-02

        What size are these sheets? TY

        Asked by: Bugler
        These are 32"x54"
        Answered by: Dee D
        Date published: 2024-07-15

        Choosing your 2" Product for a twin Marine Diesel engine room: 1. Will this trap "additional" heat in the engine room? 2. Must you cover & seal EVERY inch of engine room from waterline up, hull sides, deck above ceiling, all hatches, etc.

        Asked by: BarryCuda
        Hello, It is possible it may trap some heat depending on the ventilation available you need to leave proper airflow to the engine. The more area you can cover, the more effective it will be. Some areas it may not be practical to cover. This link will take you to the installation instructions posted on our website: https://defender.com/assets/pdf/soundown/301872_install.pdf
        Answered by: Upwind
        Date published: 2024-04-05

        Will the product prevent any fire in the engine room to spread into the boat.

        Asked by: Louis
        I believe this product has a UL94- hf1 rating for flammability. Internet search will be able to provide the specifications.
        Answered by: JDGreen
        Date published: 2025-03-07

        Are these sheets rigid or flexible?

        Asked by: Anonymous
        They are reasonably flexible but it will not do tight radii (< 1ft Radii would be my guess). I have found it to work well on most installations.
        Answered by: Anonymous
        Date published: 2023-11-21
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        Soundown Sound-Stop Foam Panel with 1 lb Barrier Layer
        Total:
        $112.99 - $152.99