Zero International 870 42" x 8...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$475.55
Zero International 42" x 84" Adjustable Sealing - Adjustable System Sound Seal

Zero International 870 42" x 84" Adjustable Sealing - Adjustable System Sound Seal

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Model: 870AA-42X84

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

$475.55
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Zero International 42" x 84" Adjustable Sealing - Adjustable System Sound Seal

The Zero International 42" x 84" Adjustable System Sound Seal is a precision-engineered acoustic and weather sealing solution designed to enhance sound control, air-tightness, and energy efficiency for door assemblies. Constructed from heavy-duty extruded aluminum with a high-performance elastomeric seal, this adjustable system allows for fine-tuning compression between the door and frame, ensuring an exact fit and consistent seal over time.

Ideal for sound-rated, smoke-control, and energy-efficient applications, this seal system provides exceptional durability, reliability, and acoustic performance in demanding environments such as studios, offices, healthcare facilities, and hospitality spaces.

Features

  • Adjustable Design
    Enables precise alignment and compression control for optimal sealing performance.

  • Superior Acoustic Performance
    Reduces sound transmission and improves STC-rated door assembly performance.

  • Durable Aluminum Construction
    Made from extruded aluminum for long-term strength, corrosion resistance, and stability.

  • High-Quality Seal Material
    Equipped with a resilient sound-absorbing elastomeric insert for maximum noise isolation.

  • Energy and Environmental Protection
    Blocks air, smoke, dust, and moisture infiltration, promoting energy efficiency and comfort.

  • Universal Application
    Compatible with wood, metal, and composite doors in new or retrofit installations.

  • Professional Appearance
    Sleek, low-profile design with architectural finish options complements any modern interior.

Specifications

Attribute Details
Manufacturer Zero International
Model / Series Adjustable System Sound Seal
Product Type Adjustable Acoustic Door Seal
Material Extruded Aluminum with Elastomeric Insert
Dimensions 42" x 84"
Adjustment Range Typically 1/8" to 1/4" (varies by model)
Finish Options Mill Finish, Clear Anodized, or Bronze Anodized
Mounting Type Surface or Semi-Recessed Mount
Seal Material Silicone, Neoprene, or High-Density Polymer (depending on model)
Applications Sound-rated, smoke, and energy-efficient door systems
Performance Air, sound, and smoke barrier
Compliance UL Classified; 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 870AA-42X84 – Frequently Asked Questions

1) What size opening does the Zero International 870 adjustable sound seal cover?
The 870 adjustable system sound seal is supplied at 42 x 84 inches, so it is cut for a single opening of that size rather than sold by the stock length. If your door is a different size, you want a different length of the same 870 system, not a field splice of this one.
2) Will a Zero 870 seal work on a hollow metal frame, or is it only for wood doors?
Both. The 870 adjustable sound seal is used on wood, metal, and composite doors, and it goes into new construction or a retrofit on an existing opening.
3) What is an adjustable sound seal, and when do I need one instead of a plain weatherstrip?
An adjustable seal like the Zero 870 lets you set the compression between the door and the frame after the seal is mounted, instead of relying on the door hanging exactly where the strip expects. That matters on sound-rated, smoke-control, and energy work, where a gap anywhere on the perimeter undoes the whole assembly. On an ordinary exterior door where you only care about draft and weather, a fixed strip does the job and costs you nothing in tuning time.
4) What is the Zero 870 sound seal actually made of?
Extruded aluminum retainer carrying an elastomeric insert. The aluminum is what holds alignment over years of door swing, and the insert is the part that compresses against the door to stop air, sound, smoke, and dust.
5) Is the Zero 870 seal rated for commercial door traffic or is it a residential product?
Commercial. The 870 is a commercial door hardware item, which is why it shows up on studio, office, healthcare, and hospitality openings where the door assembly has to hold an acoustic or smoke performance rather than just cut a draft.
6) Does the Zero 870 seal come with the screws to mount it?
Mounting screws ship with the 870 along with the adjustment instructions, so you are not sourcing fasteners separately. Plan on the tuning pass after hanging: the compression is set at install, and that setting is what the acoustic performance rides on.
How fast can I get the Zero International 870AA-42X84 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 870AA-42X84 come with a warranty?
Absolutely. The Zero International 870AA-42X84 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 870AA-42X84?
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 870AA-42X84 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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