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TMH Automatic Door Bottom, Surface Mounted, Heavy Duty, Sponge Neoprene Seal, 1" Drop - QuickShip

 TMH Automatic Door Bottom, Surface Mounted, Heavy Duty, Sponge Neoprene Seal, 1" Drop - QuickShip
Product Specs of Automatic Door Bottom 361 Clear Anodized Door Bottom 361 Aluminum Door Bottom 361 Applied on Interior Wooden Door, in Open Position Aluminum Door Bottom 361 Applied on Interior Wooden Door, in Closed Position Dark Bronze Anodized Door Bottom 361

This Surface Mounted, Heavy Duty, Sound Rated Automatic Door Bottom provides the best sound seal possible for normal sound levels, and will prevent infiltration of light, drafts and more. Equipped with a long lasting, high-quality sponge neoprene seal and mechanism that has been tested to 5 million openings and closings. Rated for fire, smoke and sound infiltration and available in two anodized finishes. Length is available in 32" and 36". View more details in the description below.

How to Order: Select Finish and Exact Size required, this will determine your total price. To determine sizing needed for your door bottom, see How to Meaure for an Automatic Door Bottom.

Available in stock sizes - 32" and 36" long ship within 1 Business Day! For custom sizes, see our Surface Mounted Automatic Door Bottom #361. 

Price: $93.46
Exact Length
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Made in USA
SKU T361AA|32
Shipping See Shipping Tab Below

This is a QuickShip product, available in stock sizes only - for custom sizes see our full product Surface Mounted Automatic Door Bottom #361.

Dimensions:  Casing measures 1.901" by .916" with .083" thick aluminum casing.

Length: Available in stock lengths. Can be cut up to 2" on the field.

Seal:  Closed cell sponge neoprene rubber seal.

Available Colors:  Clear Anodized, Dark Bronze Anodized

Compliance Details:  Smoke rated, fire-rated and is UL listed. See Product Data tab for more details.

Handing:  Can be used on both right handed and left handed doors.

Installation:  Installation instructions and screws included. Screws are colored to coordinate with casing.

Sizing:  To determine sizing required, see How To Measure For An Automatic Door Bottom.

Insert Replacement: Click here to purchase a Sponge Neoprene Replacement Seal for this product.

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 3 year guarantee against defects in material and workmanship.
Click to view our Full Warranty Policy.

See also our High Sound Automatic Door Bottom for even higher sound control.

How It Works

Automatic Door Bottoms utilize a concealed flat spring mechanism and plunger. When the door is closed, a brass plunger is compressed to automatically lower the seal, starting from the hinge side first. This motion ensures a smooth usage even on an uneven surface and prevents drag. The seal is automatically raised upon opening. These automatic door bottoms have been successfully tested through 5 million cycles!

See also About Automatic Door Bottoms.

Product Specs
Compliance Details

Complies with the following ANSI / BHMA Codes: R3C334

Installation Guide

Click here for a Printable Copy of How to Install an Automatic Door Bottom.

Automatic Door Bottoms are available with three mounting options: Surface Mounted, Semi-Mortised and Fully Mortised. A surface mounted application can be applied without removing the door from its hinges. For a semi-mortised, if the rabbet in the door is cut-out already, the door does not need to be removed. For a fully mortised application the door should be removed before starting. 


Once your door is ready for installation you need to determine the size required for your door bottom:

  • For a Surface Mounted Application: Measure the distance between the two stop moldings, or if a perimeter door gasket is applied, measure the distance between the two installed gaskets, then minus 1/8-1/4"” (.125”) from the total distance. That is the size needed for your door bottom.
  • For a Semi-Mortised and Fully Mortised Application: Measure your door from side to side; that is the measurement needed for your automatic door bottom.

For visual presentation see How to Measure for an Automatic Door Bottom.

How to Install an Automatic Door Bottom- Figure 1

Once you have determined the size needed, if necessary, trim your door bottom. Use a chop saw or table saw to create a perfectly straight cut.

Note, Only trim opposite the actuating plunger, brass nut. (Trimming from the brass nut side will ruin your ADB).


How to Install an Automatic Door Bottom- Figure 1You can trim from the edge up to one inch of the screw in the side wall of the ADB.



How to Install an Automatic Door Bottom- Figure 3Surface Mounted and Semi-Mortised models need to be applied to the push side of the door only (the side with the door stops). The actuating plunger needs to be applied to the hinge side of the door for all applications.

Place the automatic door bottom against the door

Once you have the automatic door bottom leveled and positioned correctly, with a pencil or marker mark where the attachment screws need to be drilled.


How to Install an Automatic Door Bottom- Figure 4

To make installation easier you can drill a pilot hole which will ensure you attach the door bottom to the correctly marked spot. With the screws provided, screw in the automatic door bottom.

In some models, a plate is provided for the hinge side of the frame. This will protect the door frame from getting worn down by the actuating plunger. If provided, attach to corresponding point on the frame.



How to Install an Automatic Door Bottom- Figure 5Now that the door bottom is attached, test the door bottom by opening and closing the door to ensure there is a full seal. If the seal does not come down far enough twist the brass nut out, if it seals too tight twist the brass nut in.

Once you have followed through with all the instructions your Automatic Door Bottom is good to go! Enjoy years of quality sound, draft and light infiltration control with your new door bottom.

For additional assistance and product information, feel free to contact us. Our trained and friendly staff will guide you with all your soundproofing needs.


Shipping / Returns
  • Ship Time:
    • This product qualifies for QuickShip - will ship within 1 business day. Quantities may be limited.
    • If out of stock, shipping may take up to 2 weeks. Please call to confirm.
    • 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.
  • Alaska and Hawaii, Canada, and International Shipping:
  • Returns:
    • This products can be returned up to 30 days from date of purchase.
    • Item must be in new, resaleable condition. No restock fee will be applied.
    • 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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