Home > Door Seals > Automatic Door Bottoms > Mortised > Zero # 3552, Automatic Door Bottom, For Metal Doors, Mortised with Brush Seal, .5" Drop

Zero # 3552, Automatic Door Bottom, For Metal Doors, Mortised with Brush Seal, .5" Drop

Zero # 3552, Automatic Door Bottom, For Metal Doors, Mortised with Brush Seal, .5" Drop
Mortised ADB with Double Brush Seal Mortised ADB with Double Brush FLO Seal Mortised ADB in Hollow Metal Door Application

This Zero International #3552 automatic door bottom is designed to be applied in the hollow channel found on metal doors. It is crafted from high quality material that will ensure smooth operation. It is fitted with a set of two rows of nylon brushes, see below for details. Available in aluminum mill finish and is custom cut to size.

Sizing: To determine size required, see How to Measure for an Automatic Door Bottom.


Price: $58.72
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SKU Z3552A|36
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This automatic door bottom is fitted with double set of nylon brush seals that compress against the floor to minimize infiltration of light, drafts, dust and moisture. The bristles are made of high quality material which remain flexible in extreme weather conditions and they conform well to surface irregularities, making them ideal to be applied over uneven surfaces, such as a tiled floor.

How it Works: The door bottom utilizes a concealed flat spring mechanism which is activated when the door is closed and lowers the brush seal tightly against the floor or a saddle to create a strong and reliable barrier. As soon as the door is opened, it automatically retracts in a smooth and quick motion without causing a drag against the floor.

As with all our other high quality door bottoms, it has been successfully tested through 5 million cycles and is built to last! The aluminum casing is fully mortised, lending a clean look to any door. It is designed to be applied to a hollow metal door and has a maximum drop of .5 inches. It is compatible with both a right or left handed door. Available in aluminum mill finish and is length custom cut to size.

  • Double brush seal
  • Nylon bristles remaind flexible in extreme weather
  • .5" maximum drop
  • Compatible with both right and left handed doors
  • Custom cut to size

Installation screws provided.

To determine sizing needed, see How to Measure for an Automatic Door Bottom.

Please note, images are for illustrative purposes only. They are not actual photos. Therefore, actual colors may vary slightly and size may be enlarged to show detail. See product specs for exact measurements.

This product has a 1 year guarantee against defects in material and workmanship.
Click to view our Full Warranty Policy.

Click here to view a rubber seal version of this product, Zero International #355 Mortised Automatic Door Bottom with Double Neoprene Seal.

Product Specs
Compliance Details

Product Specs for Z3552

Shipping / Returns
  • Ship Time:
    • This product is custom made to your specifications, please allow 2-3 weeks to ship
    • *Similar or equivalent products from other manufacturers may be available to ship sooner. For expedited processing please contact our customer service department.
    • EXCEPTIONS: Gold Anodized Aluminum and Black Anodized Aluminum Products require 2-6 week processing time.
    • Ships via major carriers, such as UPS or FedEx Ground, with tracking information provided.
  • Domestic Shipping Fees- (Hawaii and Alaska not Included):
    • FREE SHIPPING on orders over $200.00 (excludes oversized and freight orders).
    • There will be a flat $19.99 shipping and handling fee on orders under $200.00.
    • Oversized Items: Items 86" and above have an oversize surcharge of $70.00
    • Freight Orders: Items 95" and above require freight shipment and have a shipping charge of $150.00
    • Orders totals above $1,500.00 will ship free, regardless of size.
  • Alaska and Hawaii, Canada, and International Shipping:
  • Returns:
    • This product is custom made and is not returnable.
    • We are commited to your satisfaction, as a courtesy, we may, at our discretion accept returns with a minimum 30% restock fee.
    • Weatherstripping products will not be considered for returns.
    • Item must be in new, resaleable condition.
    • Please call or email us to receive an RMA number before returning. No returns will be processed without an RMA number.
    • Return shipping is customer's responsibility. A return address will be provided with RMA#.
    • If you are shipping via USPS (not recommended) do NOT require signature as we will not be able to pick up your package from local post office facility.
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