Home > Door Seals > Automatic Door Bottoms > Mortised > Zero #3551, Automatic Door Bottom, For Metal Doors, Mortised, with Neoprene Seal, .5" Drop

Zero #3551, Automatic Door Bottom, For Metal Doors, Mortised, with Neoprene Seal, .5" Drop

Zero #3551, Automatic Door Bottom, For Metal Doors, Mortised, with Neoprene Seal, .5" Drop
Aluminum Mill Finish, Mortised, Metal Doro Seal in the open position Seal in the closed position

This Zero International #3551, automatic door bottom is designed to be mortised within the hollow interior of metal doors. Built to last, the strong, durable aluminum casing contains a high quality neoprene seal insert which effectively seals a gap of .5” beneath the door greatly reducing infiltration of light, sound, dirt, and drafts. Custom cut to size.

Sizing: To determine length needed, see How to Measure for an Automatic Door Bottom.

Price: $55.52
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Made in USA
SKU Z3551|36
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The fully mortised aspect of this automatic door bottom is great for high end designer doors and luxury hotels and condo units that prefer their doors retain their clean, unobtrusive look.

Door Compatibility: Designed for hollow metal doors with minimum 1.5" wide cavity.

Dimensions: 1.375" W x .75" H x Custom Cut Length up to 54". See product specs for more details. To determine sizing, see How To Measure For An Automatic Door Bottom

Seal: Fitted with two neoprene bulb seals that can seal gaps up to .5". Seal extends past the casing 5/16"

Available Finishes: Aluminum Mill Finish

Handing: This product is non-handed, can be applied to both right and left handed doors.

The product in the detailed image is used in conjunction with our Utility Thershold.

Installation: Sheet metal screws (SMS) are provided for installation.

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 here to view our full Warranty Policy.

For a double neoprene seal see our Zero Automatic Door Bottom, Handed, Mortised for Metal Door with Double Neoprene Seal, 5"Drop.

Product Specs
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Compliance Details

compliance details for z3551

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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