Zero International 870 36" x 8...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$666.36
$275.30
Zero International 36" x 84" Adjustable Sound Seal - Adjustable Sealing System

Zero International 870 36" x 84" Adjustable Sound Seal - Adjustable Sealing System

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Model: 870D-36X84

In Stock (leaves warehouse same day if ordered before 3pm ET)

$666.36
$275.30
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Zero International 36" x 84" Adjustable Sound Seal - Adjustable Sealing System

The Zero International 36" x 84" Adjustable Sound Seal provides superior acoustic, smoke, and environmental sealing for door assemblies. Designed with precision-engineered extruded aluminum and a resilient elastomeric insert, this adjustable sealing system allows fine-tuned compression adjustment, ensuring a consistent and reliable seal over time.

Ideal for sound-rated and energy-efficient door applications, it helps block air, smoke, and sound transmission, enhancing comfort, safety, and energy performance. With a sleek, professional finish and easy installation, the system is an excellent choice for commercial, institutional, and residential environments where performance and aesthetics matter.

Features

  • Adjustable Compression Design
    Allows precise adjustment to maintain an optimal seal even as door or frame conditions shift.

  • Exceptional Acoustic Performance
    Reduces sound transmission and leakage, improving overall STC performance.

  • Durable Aluminum Frame
    Constructed from extruded aluminum for long-term strength and corrosion resistance.

  • High-Performance Seal Material
    Includes a resilient silicone or neoprene insert for reliable sound and smoke control.

  • Energy and Smoke Protection
    Provides an effective barrier against air, smoke, and temperature changes, improving efficiency.

  • Professional Finish
    Sleek, architectural profile available in multiple finishes to complement modern interiors.

  • Easy Installation
    Pre-drilled mounting holes and adjustable hardware allow precise on-site customization.

Specifications

Attribute Details
Manufacturer Zero International
Model / Series Adjustable Sound Seal System
Product Type Adjustable Acoustic Door Seal
Material Extruded Aluminum with Elastomeric Insert
Dimensions 36" x 84"
Adjustment Range Typically 1/8" to 1/4" (varies by model)
Finish Options Mill, Clear Anodized, or Bronze Anodized
Seal Material Silicone, Neoprene, or High-Density Polymer
Mounting Type Surface or Semi-Recessed Mount
Applications Sound-rated, smoke, and weather-sealed doors
Performance Air, sound, and smoke barrier
Compliance UL Listed; ANSI/BHMA Certified; ASTM E90, NFPA 80 Compliant
Hardware Included Mounting screws and adjustment instructions

Product Specs

Commercial/Residential:
Commercial
Product Group:
Door Trim and Accessories
Product Subgroup:
Door Bottom Sweeps and Door Shoes
Product Type:
Door Bottom
Department:
Door Hardware

Zero International 870D-36X84 – Frequently Asked Questions

1) How does an adjustable sound seal differ from a plain door sweep or a bulb gasket?
A plain sweep or a fixed bulb gasket sets its compression once, at the moment you screw it on, and whatever gap you have after that is what you live with. The 870 sound seal uses adjustable hardware so the elastomeric insert can be pushed in or backed off after mounting, which is how you recover the seal on a door that has settled, a frame that is out of square, or a leaf that has been planed. On a sound-rated opening that adjustment is the difference between a continuous seal and a leak path, because acoustic performance is decided at the last sixteenth of an inch of contact. For a plain weather or dust sweep on a utility door, a fixed sweep is the simpler part.
2) Is the Zero 870 sound seal surface mounted or does it get mortised into the door?
Both mountings are supported. The 870 can go on as a surface mount, screwed to the face of the door or frame with the pre-drilled holes, or set semi-recessed where the detail calls for the aluminum to sit flush. Surface mounting is the retrofit route on an existing opening since it needs no routing; semi-recessed is the cleaner look on new work where the door or frame can be prepped before hanging.
3) What comes in the box with the Zero 870 sound seal, and do I need anything else to install it?
Mounting screws and the adjustment instructions ship with the 870 seal, so a standard install on a wood or hollow metal door needs nothing beyond a drill, a driver and a hacksaw or chop saw if you are cutting the aluminum to length. What is not in the box is anything for the sill: this is a perimeter sealing system, so if the opening also needs a threshold or an automatic door bottom, that is a separate part on the order.
4) Is the Zero 870 sound seal rated for commercial use, or is it a residential product?
It is a commercial-duty part. The 870 is an extruded aluminum frame carrying an elastomeric insert, which is the construction used on sound-rated and smoke-sealed openings in commercial and institutional buildings, not a foam-tape residential weatherstrip. The aluminum also holds screw threads for the adjustment hardware over repeated resetting, which a vinyl or foam seal will not.
5) Will a Zero 870 sound seal help on a door that is leaking noise from the sides and top rather than the bottom?
Yes, that is the leak this part addresses. The 870 is a perimeter sealing system for the head and jambs, sealing the gap between the door edge and the stop, and sound leaves an opening through those gaps far more than through the door panel itself. Compression is the whole mechanism, so if the leaf is warped or the frame is racked, set the adjustment tighter on the loose side until the insert makes continuous contact along the full run. A bottom gap is a separate problem and takes a door bottom or a threshold seal.
6) Can the Zero 870 sound seal be used on a smoke-rated door assembly?
Smoke and air control is one of its stated functions, alongside acoustic sealing. The elastomeric insert forms a continuous barrier against air, smoke and sound around the door perimeter. On a rated assembly, the seal has to be the one named in the door manufacturer's listing for that assembly, so match the part to the door's listing paperwork before it goes on a labeled opening.
How fast can I get the Zero International 870D-36X84 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Zero International 870D-36X84 come with a warranty?
Absolutely. The Zero International 870D-36X84 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Zero International 870D-36X84?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Zero International 870D-36X84 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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