Cal-Royal ADB-704 Automatic Do...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$155.14
Cal-Royal ADB-704 Automatic Door Bottom, Heavy Duty Mortised Application with Neoprene Seal

Cal-Royal ADB-704 Automatic Door Bottom, Heavy Duty Mortised Application with Neoprene Seal

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Model: ADB-704D-36
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$155.14
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Cal-Royal ADB-704 Automatic Door Bottom, Heavy Duty Mortised Application with Neoprene Seal

The Cal-Royal ADB-704 is a heavy-duty automatic door bottom engineered for mortised applications, featuring a durable neoprene seal that blocks out air, smoke, sound, and fire at the base of the door. Constructed from extruded aluminum, this unit measures 15/16" (23.5mm) in width, 1 8" (42mm) in height, with a maximum drop of 8" (22.2mm). Non-handed and fully reversible for left or right hand installation, the ADB-704 is designed for use on wood or hollow metal doors, delivering low closing force and slotted holes for precise adjustment.

Key Features

  • Compact Profile Dimensions: Width of 15/16" (23.5mm) and height of 1 8" (42mm) allow for precise mortised installation without excess bulk.
  • Maximum Drop: 8" (22.2mm) drop provides effective sealing contact against the threshold while maintaining smooth door operation.
  • Heavy-Duty Extruded Aluminum Construction: Built from extruded aluminum for long-term durability in commercial door applications.
  • Neoprene Seal: Provides an efficient seal that blocks out air, smoke, sound, and fire for improved environmental control and safety.
  • Non-Handed, Reversible Design: Suitable for either left or right hand door installation without requiring separate handed models.
  • Low Closing Force: Engineered to activate with minimal resistance, supporting smooth and reliable door closing.
  • Adjustable Fit: Slotted holes allow for fine adjustment during installation to achieve proper seal contact.
  • Versatile Door Compatibility: Can be installed on wood or hollow metal doors, or as specified for the application.

Technical Specifications

  • Subcategory: Thresholds
  • Product Group: Door Trim and Accessories
  • Product Subgroup: Door Bottom Sweeps and Door Shoes
  • Commercial/Residential: Commercial
  • Product Category: Door Trim and Accessories
  • 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 Cal-Royal ADB-704?

Cal-Royal ADB-704 automatic door bottoms deliver dependable environmental sealing through heavy-duty extruded aluminum construction and a resilient neoprene seal designed to block air, smoke, sound, and fire. The non-handed, reversible design combined with slotted-hole adjustability makes this a practical, professional-grade solution for commercial door openings requiring reliable, low-force sealing performance.

Product Specs

Subcategory:
Thresholds
Product Group:
Door Trim and Accessories
Product Subgroup:
Door Bottom Sweeps and Door Shoes
Product Type:
Automatic Door Bottoms
Commercial/Residential:
Commercial
Product Model:
ADB-704
Product Category:
Door Trim and Accessories
Department:
Door Hardware

Cal-Royal ADB-704D-36 – Frequently Asked Questions

1) Is the Cal-Royal ADB-704 automatic door bottom mortised into the door or surface applied?
Mortised. The ADB-704 is cut into a routed pocket in the bottom edge of the door, so the aluminum housing sits flush in the door rather than hanging on the face of it. That means you need to mill a channel in the door bottom before it goes in. If the door can't be taken down and routed, a surface mount unit is the way to go instead, such as the Pemko SA Series surface mount automatic door bottom.
2) How wide does the mortise pocket need to be for a Cal-Royal ADB-704?
The housing is 15/16 inch (23.5mm) wide, so that is the channel width to rout in the door bottom. On a standard 1-3/4 inch commercial door that leaves material on both faces of the pocket. Slotted mounting holes let you shift the unit up or down at the end plates to dial in seal contact once it is in.
3) Does the Cal-Royal ADB-704 need to be ordered left hand or right hand?
No handing to specify. The ADB-704 is non-handed and fully reversible, so the same unit works on a left hand or right hand door. You only pick finish and length when you order.
4) Will a Cal-Royal ADB-704 work on a hollow metal door, or is it wood only?
Both. The ADB-704 is built for wood and hollow metal doors, which covers most commercial openings, offices, schools, healthcare, retail, warehouse, and multi-tenant residential. The body is extruded aluminum with a neoprene seal.
5) What is the closest equivalent to the Cal-Royal ADB-704 automatic door bottom from Pemko?
The Pemko SA Series SA3-36 is the nearest counterpart: it is also an automatic door bottom, in a 36 inch length, using a GREENGUARD Gold certified Eco-V insert. The difference is how it goes into the door. The Cal-Royal ADB-704 is built for a mortised application, so the housing sits in a routed pocket in the door bottom and finishes flush. The Pemko SA3-36 is surface mounted, fastened to the face of the door bottom with no routing. Both drop a seal against the threshold when the door closes; pick by whether the door can be prepped or has to stay intact.
6) The door is already hung and I cannot route the bottom rail. What automatic door bottom can I use instead of a mortised unit?
Use a surface mounted automatic door bottom such as the Pemko SA3-36, a 36 inch SA Series automatic door bottom that mounts to the face of the door rather than into a routed pocket. The Cal-Royal ADB-704 is a mortised unit and expects the door bottom to be prepped for it, which is work best done off the hinges or at the shop. On an existing opening where the leaf stays in place, the surface mount version gives the same drop-seal action without the routing.
7) Is a door bottom sweep the same thing as the Cal-Royal ADB-704?
No. The Pemko 345 Series 3345PK is a door bottom sweep: a fixed seal attached along the bottom of the door that stays in contact with the floor at all times, and in that version it carries a rain drip and a PemkoPrene insert for an exterior opening. The Cal-Royal ADB-704 is an automatic door bottom, meaning the neoprene seal is retracted while the door swings and drops only when the door closes against the stop. If the opening has carpet, an uneven floor, or a threshold the door has to clear, that retracting action is the reason to specify the ADB-704 rather than a sweep.
8) What lengths and finishes does the Cal-Royal ADB-704 come in?
Two lengths, 36 inch and 48 inch, each in two finishes: AN mill finish aluminum with neoprene insert, and DN dark bronze anodized aluminum with neoprene insert. All four combinations are orderable. For a 3-0 door the 36 inch is the fit; the 48 inch covers wider leaves and gets cut down to the door width.
9) What is the difference between an automatic door bottom and a door sweep?
A sweep is fixed. It hangs a gasket off the bottom rail and drags on the floor the whole time the door swings, like the Pemko 345 Series door bottom sweep. An automatic door bottom like the Cal-Royal ADB-704 keeps the seal lifted while the door is open and drops it only when the door closes against the stop. That matters over carpet, over an uneven floor, or where a dragging sweep would wear out or add swing resistance. The ADB-704 is the mortised version, so it hides inside the door edge instead of showing on the face.
10) Will an automatic door bottom help with sound and smoke, or just drafts?
The neoprene seal on the ADB-704 closes the gap at the door bottom against air, smoke, and sound transfer. That is why these go into corridor doors, exam rooms, offices, and tenant separations, not just exterior openings. It is a commercial-duty part, heavy duty extruded aluminum rather than a residential sweep.
11) Will an automatic door bottom make a door harder to close or stop it from latching?
The ADB-704 is a low closing force unit, so the plunger takes little push at the hinge end to trip the seal down. Doors on a closer still latch normally. If the seal drops too early or too late, back the end plate off through the slotted holes and reset it, that adjustment is what tunes the contact at the threshold.
12) For a simple interior door that just needs the gap at the floor closed, do I need the Cal-Royal ADB-704 or something simpler?
A fixed sweep like the Pemko 345 Series 3345PK, a 36 inch door bottom sweep, closes the floor gap with no door prep and no moving parts. Choose the Cal-Royal ADB-704 when the seal has to lift clear of the floor as the door swings, or when the specification calls for a mortised unit that finishes inside the door bottom rather than showing on the face. The ADB-704 is the heavy duty commercial route; the sweep is the single-component route.
13) Which automatic door bottom should I use on an exterior opening that takes driving rain?
For a door face that sheds water, the Pemko 345 Series 3345PK carries a rain drip along with its PemkoPrene sweep insert, so runoff is thrown clear of the bottom of the door. The Cal-Royal ADB-704 is a mortised automatic door bottom with a neoprene seal intended to block air, smoke, sound, and fire at the base of the door, and it is often paired with separate rain drip or weatherstrip components on an exterior leaf rather than providing that function itself.
14) I need 48 inch coverage on a wide leaf. Can I use the Pemko automatic door bottom or the Cal-Royal?
The Cal-Royal ADB-704 comes in a 48 inch length as well as 36 inch, in mill finish aluminum or dark bronze anodized aluminum, both with a neoprene insert. The Pemko SA3-36 automatic door bottom and the Pemko 345 Series 3345PK sweep are both 36 inch units. For a leaf that needs the longer run without cutting down from stock, the ADB-704 covers it directly.
15) Can I standardize the Cal-Royal ADB-704 across a building with different door widths?
Yes, and that is the usual way it is bought. One non-handed unit covers left and right hand doors, so you stock a single part rather than two. Order the 48 inch for wider leaves and the 36 inch for standard 3-0 openings, and pick AN mill finish or DN dark bronze anodized to match the rest of the hardware on the opening.
How fast can I get the Cal-Royal ADB-704D-36 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 Cal-Royal ADB-704D-36 come with a warranty?
Absolutely. The Cal-Royal ADB-704D-36 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 Cal-Royal ADB-704D-36?
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
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