Zero International 370A Perime...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$120.35
Zero 370A Perimeter Seal with Magnet

Zero International 370A Perimeter Seal with Magnet, Fire-Rated Aluminum Gasketing

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Model: 370A 48
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$120.35
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Zero International 370A Perimeter Seal with Magnet, Fire-Rated Aluminum Gasketing

The Zero International 370A Perimeter Seal with Magnet is an adjustable aluminum sealing system engineered to meet the industry's highest standards for reliability and performance. Measuring 90" in length, .406" W by .656" H, this magnetic perimeter seal is designed for sound control applications while also delivering fire-rated protection to UL10c standards. Constructed from durable aluminum and installed via screw mounting, the 370A is built for demanding commercial door perimeter sealing needs where air infiltration control and acoustic performance are essential.

Key Features

  • Precise Dimensions: 90" length with a .406" W x .656" H profile for accurate fit on standard commercial door perimeters.
  • Aluminum Construction: Durable aluminum housing provides long-term performance and resistance to wear in high-traffic commercial applications.
  • Integrated Magnet: Magnetic sealing element enhances contact and sealing efficiency along the door perimeter for improved sound and air control.
  • Adjustable Sealing System: Adjustable design allows fine-tuning for optimal seal contact, supporting reliable sound control solutions.
  • Screw Mounting: Simple screw-mount installation for secure, long-lasting attachment to the door frame.
  • Fire-Rated Protection: Rated to UL10c standards, supporting compliance in fire-rated door assemblies.
  • Air Infiltration Control: Tested for air infiltration performance to help maintain building envelope integrity.
  • Sound Control Performance: Engineered as part of an acoustic sealing solution to reduce sound transmission through door perimeters.

Certifications & Compliance

  • Fire-Rated UL10c
  • Air Infiltration Tested
  • Sound Control Tested

Technical Specifications

  • Commercial/Residential: Commercial
  • Product Group: Door Trim and Accessories
  • Product Subgroup: Astragals, Gaskets and Weatherstripping
  • Product Type: Gasketing
  • Department: Door Hardware

Typical Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Zero International 370A?

Zero International perimeter seals are engineered from durable aluminum and rated to UL10c fire standards, reflecting a commitment to reliability and performance in demanding commercial door assemblies. With adjustable sealing, integrated magnetic contact, and tested air infiltration and sound control performance, the 370A delivers professional-grade sealing for applications where fire safety, acoustics, and air control all matter.

Manufacturer Resources

Zero Full Line Catalog

Product Specs

Commercial/Residential:
Commercial
Product Group:
Door Trim and Accessories
Product Subgroup:
Astragals, Gaskets and Weatherstripping
Product Type:
Gasketing
Department:
Door Hardware

Zero International 370A 48 – Frequently Asked Questions

1) Is the Zero 370A perimeter seal approved for use on a fire-rated door assembly?
The 370A magnetic perimeter seal is rated to UL10c, so it can be used on fire-rated door assemblies where UL10c gasketing is called for. It is also tested for air infiltration and for sound control, which is why it shows up on healthcare, education, and office openings where one seal has to satisfy the fire inspector and the acoustic spec at the same time.
2) Why use a magnetic door seal instead of a plain vinyl or neoprene perimeter gasket?
A magnet pulls the sealing element into positive contact with the door face every time it closes, which is what gets you consistent acoustic and air performance on a hollow metal opening. Plain compression gaskets rely on the door pressing hard enough against the bulb, and they drift as the door settles. If your opening is not steel, or the priority is simple weather sealing rather than sound, a vinyl seal like the NGP 155V or a neoprene sponge seal like the NGP 108NA does that job with less fuss. The tradeoff: the magnet only works against a ferrous door.
3) Will a magnetic perimeter seal work on a wood door?
No. The magnet in the 370A needs a steel door face to pull against, so on a wood or fiberglass door it gives you nothing beyond the extrusion sitting there. For those openings use a compression style seal instead, such as the NGP 155V vinyl perimeter seal or a Cal-Royal PG-601 aluminum channel gasket with a vinyl insert, both of which seal by contact pressure rather than magnetic attraction.
4) Does the Zero 370A seal the bottom of the door too?
No. The 370A is a perimeter seal, meaning it handles the head and the two jambs. The gap under the door is a separate part, either a door bottom or a sweep, plus a threshold if the opening needs one. Budget for those separately when you are pricing a full sound or smoke seal package, because the perimeter alone leaves the largest leak path open.
5) What is the closest magnetic perimeter seal to the Zero 370A from another manufacturer?
The NGP 159MA magnetic seal is the nearest cross-brand equivalent. Both use a magnetic sealing element in an aluminum housing for door perimeter sealing, and both are offered in an anodized aluminum finish. The 159MA comes in an 84 inch length, while the 370A is supplied in a 48 inch clear anodized length, so check the height of the opening and the head width before you swap one for the other on a frame.
6) The frame is in a boiler room that runs hot. Is there a perimeter seal better suited than the Zero 370A?
For a high-temperature mechanical space, look at the NGP 108NA neoprene sponge seal, which carries a stated temperature range of -20 F to 200 F in an anodized aluminum frame. The Zero 370A is an aluminum magnetic seal built around sound control and air infiltration performance on commercial door perimeters, so it is the choice when acoustic sealing is the objective rather than thermal exposure.
7) Which perimeter seal should I specify on a fire-rated door opening instead of a general-purpose gasket?
The Zero International 370A is rated to UL10c, which is what supports its use in a fire-rated door assembly. Among the cross-brand options, the Cal-Royal PG-601 is an aluminum channel perimeter gasketing with a vinyl insert and the NGP 155V is a vinyl perimeter seal in a mill aluminum frame - both are general commercial perimeter gasketing. On an opening where the fire rating drives the spec, the 370A is the one carrying the UL10c rating.
8) Can the Zero 370A seal be adjusted after it is installed?
Yes, the 370A is an adjustable system, so contact pressure can be fine tuned after mounting instead of being fixed by where the screw holes landed. That matters on a door that has settled or on a frame that is not perfectly plumb, because you can chase the seal back into contact without pulling the extrusion off and re-drilling.
9) If I want to knock down sound and dust rather than seal against weather, which of these aluminum door seals should I be looking at?
For sound, the 370A is the one, since it is tested for sound control and uses a magnet to guarantee contact. A nylon brush seal like the NGP 602A does not seal acoustically at all, it sheds dust and debris and tolerates a sliding or irregular door, so those two are not substitutes for each other even though both are aluminum housed perimeter products.
10) I do not need magnetic contact, just weatherstripping on a commercial frame. What is a simpler alternative to the Zero 370A?
The NGP 155V vinyl perimeter seal is the simpler build. It seals with a vinyl insert in a mill aluminum frame rather than the magnetic element the Zero 370A uses, which means no magnet to align against the door face and no ferrous-frame requirement. Choose the 155V where you want basic commercial door weatherstripping, and the 370A where the magnetic contact is doing acoustic and air infiltration work.
11) Can I use the NGP 602A brush seal in place of the Zero 370A?
They are not interchangeable for the same purpose. The NGP 602A is a nylon brush seal in an anodized aluminum housing, so it sweeps the gap with bristles. The Zero 370A closes the perimeter with a magnetic sealing element and is tested for air infiltration and sound control, which brush filaments do not deliver in the same way. Use the 602A where you want low-friction dust and draft control; keep the 370A where the acoustic seal matters.
12) What is the difference between the Cal-Royal PG-601 and the Zero 370A for sealing a door frame?
Both are aluminum-bodied perimeter gasketing for commercial frames, and both screw into the stop. The difference is the sealing element: the Cal-Royal PG-601 is an aluminum channel carrying a vinyl insert, while the Zero 370A uses an integrated magnet with an adjustable seal so contact can be fine-tuned against the door face. If the opening was drawn for a magnetic acoustic seal, the vinyl-insert channel is a different assembly, not a drop-in.
13) Is the Zero 370A suitable for a high traffic commercial opening, or is it more of a residential weatherstrip?
It is a commercial product, with an aluminum housing rather than a vinyl or foam carrier, which is what holds shape on a door that cycles all day. Typical placements are offices, schools, healthcare, retail, warehouses, multi-tenant residential, and government buildings.
How fast can I get the Zero International 370A 48 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 370A 48 come with a warranty?
Absolutely. The Zero International 370A 48 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 370A 48?
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 370A 48 from ZenSupply?
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