Zero International 140A Aluminum Perimeter Seal with Sponge Neoprene

The 140A is a screw-mounted aluminum housing 1.625 inches wide by .430 inches high, so it needs that much flat face on the frame stop or the rabbet to sit against. The closed cell sponge neoprene bulb carries the compression against the door face. Because it fastens with screws rather than adhesive, it goes on hollow metal and wood frames alike, and it can be removed and re-set if the door is later adjusted.

Three lengths are stocked: 48 inch, 84 inch, and 120 inch, all in clear anodized. A single door opening takes two jamb pieces plus one head piece, so a typical 3070 opening is covered by two 84 inch legs and one 48 inch head cut to width. For a pair of doors, or a frame taller than 84 inches, the 120 inch stick is what you cut from. Order per opening, not per door, and allow for the cut waste at the miters.

Fire rated to UL10c, and also rated for smoke and draft control. That combination is what a fire-rated opening in a corridor or stair enclosure needs on the perimeter, so the 140A can go on a labeled door assembly rather than only on an ordinary interior opening.

A perimeter seal handles the head and the two jambs only. The gap under the door is not covered by the 140A, so an exterior opening still needs a door bottom, a door shoe, or a threshold and sweep to close that fourth side. Property managers replacing worn stripping on an entry commonly need both parts, and ordering only the perimeter leaves the biggest air and water path open.

The NGP 108NA is the nearest match in construction. Like the Zero 140A, which pairs an aluminum frame with closed cell sponge neoprene and mounts with screws, the 108NA is a neoprene sponge seal in an anodized aluminum frame. Both put a compressible sponge neoprene bulb against the stop, so an opening detailed for a sponge neoprene perimeter seal accepts either. The NGP 108NA also carries a stated temperature range of -20 F to 200 F, which matters if the opening sees exterior or unconditioned conditions.

Look at the NGP 159MA magnetic seal in anodized aluminum. A compression seal like the Zero 140A relies on the sponge neoprene bulb being crushed by the door as it closes, so the result depends on how the door is hung and adjusted. A magnetic seal pulls itself to a steel door face, which closes the gap without depending on compression. The 159MA is supplied in an 84 inch length. It requires a ferrous door or frame face to attract to, which the 140A does not.

A brush seal tolerates an uneven gap better. The NGP 602A is a nylon brush seal in an anodized aluminum housing; the filament sweeps the door face over a varying gap instead of being compressed to a fixed dimension the way the closed cell sponge neoprene on the Zero 140A is. The tradeoff is that a brush is not a compression seal, so it does not close an opening the same way a sponge neoprene bulb does. On a door where compression is achievable, the 140A remains the tighter detail.

The Zero 140A is the one to specify. It is UL10c fire rated and carries smoke and draft control, which is the requirement on a rated opening in a corridor or stair enclosure. Products that look similar in the channel - the NGP 602A nylon brush seal or the Cal-Royal PG-601 vinyl insert gasketing - are perimeter treatments for weather and light sealing and are not interchangeable with a rated smoke and draft assembly. For a facility standardizing rated openings, the 140A in clear anodized runs from 48 inch through 84 inch and 120 inch lengths to cover both jambs and the head.

Sponge neoprene, like the 140A carries, compresses against the door face and seals continuously, which is why it works for smoke and draft control and for sound. A nylon brush seal such as the NGP 602A wipes rather than compresses, so it suits doors that need low drag and tolerate air passage. A magnetic seal such as the NGP 159MA pulls the door face into contact and is generally used where an acoustic seal has to close reliably without heavy compression. Vinyl inserts, as on the NGP 155V or the Cal-Royal PG-601, are the general purpose weatherstrip alternative to sponge.

The NGP 108NA is the nearest equivalent: a neoprene sponge seal in an anodized aluminum frame, with a stated temperature range of -20 F to 200 F. It matches the 140A on the sealing material and the housing material. If you are standardizing a building on one profile, pick one and stay with it, because the housing widths differ between manufacturers and mixed profiles look wrong on adjacent openings.

Yes. The 140A is an adjustable perimeter seal, so once the screws are set the housing can be shifted to tune how hard the sponge bulb bears on the door face. That matters on older openings where the door has settled or the frame is out of square, and it is why these seals are used for sound control work where an even compression around the perimeter is what actually stops the leak.

The sealing element is the difference. The Zero 140A uses closed cell sponge neoprene in an aluminum frame, a compressible bulb that takes a set against the stop. The NGP 155V is a vinyl perimeter seal in a mill aluminum frame, so the contact element is a vinyl bulb or fin rather than sponge. Both are screw applied perimeter seals for commercial openings, and the frame finish differs as well - the 140A comes clear anodized while the 155V frame is mill aluminum.

Both are screw applied aluminum channel perimeter gaskets, so the application on the frame stop is the same idea, but the sealing element is not. The Cal-Royal PG-601 is an aluminum channel perimeter gasketing with a vinyl insert, while the Zero 140A carries closed cell sponge neoprene. If the specification calls out sponge neoprene, a vinyl insert gasket is a different product even though it mounts in the same place. A vinyl insert type also implies a replaceable insert in the channel rather than a bonded sponge bulb.

No, and this is the most common mix up when ordering. A perimeter seal like the Zero 140A mounts to the frame stop at the head and jambs to seal the three sides around the door. A door shoe mounts to the bottom rail of the door itself and seals the sill. The Cal-Royal PG-601 is catalogued in a door shoe series but is itself an aluminum channel perimeter gasketing with a vinyl insert, so read the description rather than the series name. A complete opening usually needs both the perimeter and the bottom treated.

For an exterior opening, the NGP 108NA neoprene sponge seal in an anodized aluminum frame states a service range of -20 F to 200 F, which is the spec to point to when a cold weather or unconditioned application is in question. The Zero 140A is the same family of construction - closed cell sponge neoprene in an aluminum frame - and adds UL10c fire rating and smoke and draft control, which is what governs on a rated exterior stair or vestibule door.

Commercial. The 140A is built for commercial openings, and the aluminum housing with screw fixing is what holds up on high traffic doors in offices, schools, healthcare, and multi-family corridors. It will physically go on a residential door, but you are buying commercial grade material and a fire and smoke rating you would not need on an interior house door.

Clear anodized aluminum is the finish on all three lengths. That is the standard mill-look aluminum that sits alongside aluminum thresholds, door shoes, and storefront framing without standing out. If your existing frames are painted or dark bronze, the clear anodized housing will read as a bright line around the opening.

The 140A is screw mounted, so the fixing method is screws through the aluminum housing into the frame. Contractors installing into hollow metal frames usually plan on self-tapping fasteners; into wood frames, standard wood screws. Confirm what your frame material takes before you get on site, because the fastener is what decides whether the seal holds its adjustment under traffic.