#1 Home Improvement Retailer

Internet # 324470252

Model # 43339

Store SKU # 1009213144

Top Rated

CINCH 1.75 in. x 36 in. Exterior Black Vinyl Door Bottom Seals U-Shape Slide-On Under Door Seal

$14.97
  • Vinyl under door seal with vinyl fins for an exterior door
  • Adjusts to seal 3/8 in. to 3/4 in. gap
  • Easily installs without hardware - just slide on
  • View More Details

Free & Easy Returns In Store or Online

Return this item within 90 days of purchase.

Read Return Policy

Ask about this product

Get an answer now with AI

AI-generated from the text of manufacturer documentation. To verify or get additional information, please contact The Home Depot customer service.

Product Details

About This Product

The M-D Vinyl U-Shape CINCH Slide-On Under Door Seal features vinyl fins for protection from drafts, moisture, dust and insects. Save on energy by sealing the bottom of the door and keeping the heat or air conditioning from escaping. CINCH products are easy to install since they do not require hardware and simply slide on to the door. A compression fit secures the Under Door Seal to the bottom of the door. Before installation, cut to desired length using a hacksaw.

Highlights

  • Made of rigid and flexible vinyl
  • Provides seal between the bottom of the door and threshold
  • 36 in. L x 2 in. W x 1-3/4 in. H
  • Black color
  • Seals to protect against drafts, moisture, dust and insects
  • Save on energy by sealing the bottom of the door to reduce loss of heat or air conditioning
  • Compression fit holds firmly in place
  • Cut Under Door Seal with hacksaw to desired length
  • Fits standard 1-3/4 in. thick exterior door
  • No drilling or screws required. Does not damage door.
  • Return Policy
  • California residents
     see Prop 65 WARNINGS

Product Information

Internet # 324470252

Model # 43339

Store SKU # 1009213144

Specifications

Dimensions: H 1.75 in, W 1.75 in, D 2 in

Dimensions

Product Depth (in.)

2 in

Product Height (in.)

1.75 in

Product Length (in.)

36 in

Product Width (in.)

1.75 in

Details

Builders Hardware Product Type

Door Bottom Seals

Color Family

Blacks

Color/Finish

Black

Hardware Color Family

Black

Interior/Exterior

Exterior

Location Type

Doors

Material

Vinyl

Returnable

90-Day

Warranty / Certifications

Manufacturer Warranty

No

Questions & Answers

Can it work for a glass sliding door?
ByApr 6, 2026
0 Answer | 
Answer This Question

What isle are the door sealers on
ByMar 29, 2026
0 Answer | 
Answer This Question

Will it scratch hardwood floors flooring when opening the door
ByMar 2, 2026
1 Answer | 
Answer This Question

Dear Home Depot customer, No, this product will not scratch your hardwood floors. It is made from flexible vinyl designed to glide along floors and create a seal without damaging surfaces when properly installed.

By|Mar 2, 2026


    Does it come with screws
    ByFeb 21, 2026
    1 Answer | 
    Answer This Question

    Dear Home Depot customer, This product does not require hardware and simply slides onto the door. A compression fit secures the Under Door Seal to the bottom of the door.

    By|Feb 27, 2026


      Does it come with screw
      ByFeb 21, 2026
      1 Answer | 
      Answer This Question

      Dear Home Depot customer, This product does not require hardware and simply slides onto the door. A compression fit secures the Under Door Seal to the bottom of the door.

      By|Apr 1, 2026

        (1)

        Does it work with a carpet?
        ByJan 31, 2026
        1 Answer | 
        Answer This Question

        Thank you for your question! The M-D 36 in. White Vinyl U-Shape Slide-On Under Door Seal is designed to create a seal between the bottom of the door and the threshold, helping block drafts, dust, and insects. It can work with carpet as long as the carpet does not interfere with the door closing or drag excessively on the seal. This style of seal is designed to adjust and seal gaps from approximately 3/8 in. to 3/4 in. between the bottom of the door and the floor or threshold. If the carpet is very thick or high pile, the seal may rub against it and prevent the door from opening and closing smoothly. For further questions, please contact our Customer Service Center at 800-654-8454, and a representative will be happy to assist you. Thank you for choosing M-D Building Products!

        By|Mar 5, 2026


          Would this work for my entry door from the garage
          ByDec 11, 2025
          1 Answer | 
          Answer This Question

          Hello, and thank you for your question. Yes, this slide-on under door seal can work on an entry door between the garage and the home, provided the door is a standard 1-3/4 in. thick exterior door and the gap at the bottom of the door is approximately 3/8 in. to 3/4 in. If your door and gap fall within those dimensions, it can help seal out drafts, dust, and insects. If you have further questions, please call our Customer Service Department at 800-654-8454. Thank you, M-D Team

          By|Mar 13, 2026


            Do they come in different lenghts
            ByDec 8, 2025
            1 Answer | 
            Answer This Question

            Thank you for reaching out. These are only available in 36" lengths. Please call our customer service at 800-654-8454 to discuss other options. Thanks

            By|Jan 16, 2026


              Viewing 1-8 of 140

              Customer Reviews

              4.3 out of 5

              • 4.3 out of 1,566 reviews
              • 79% recommend this product
              Filter by:
              Showing 1-10 of 1,566 reviews
              This Under Door Seal is great. Easy to cut, I used a Dremel Saw Max and it worked well. Door seal slid on the bottom of the door easily, just as designed. Good value and easy to use.
              by
              • Verified Purchase
              Manufactured with defects
              Product was manufactured with defects, one of the bottom fins is melted to the top and the edge fins are permanently warped due to the packaging
              by
              Response from MDBuildingProductsSupportMar 13, 2026
              Hello, and thank you for your review.

              We are sorry to hear about your experience and appreciate you bringing this to our attention. Our customer service team would be happy to help review the issue and assist with product information or possible solutions.

              If you have further questions, please call our Customer Service Department at 800-654-8454. Thank you, M-D Team
                poor durability
                The fins under the sweep begsn to rip off after a month of normal daily used.
                by
                Response from MDBuildingProductsSupportJan 8, 2026
                Thank you for your review. We are sorry to hear the product did not meet your expectations, please call our customer service at 800-654-8454 so we can discuss
                  This is super easy and works well. A great value. I used a table saw to cut it and notch out a spot for my cat ? door but it otherwise was just take the door off the pins , cut it to size and it slipped right on very easily.
                  by
                  • Verified Purchase
                  Too narrow
                  Too narrow and now it's stuck on the door. Someone at MD owes me.
                  by
                  Response from MDBuildingProductsSupportOct 29, 2025
                  Thank you for your review. We are sorry to hear the product did not meet your expectations, please call our customer service at 800-654-8454 so we can discuss other options or offer a replacement.

                  Thank you,
                  M-D Team
                    1 found this review helpful
                    I was looking for a solution to close a sizable gap at the bottom of an old entry door in our home, and this product worked perfectly. It was simple to install, looks good, and made an immediate difference. Highly recommend!
                    by
                    2 found this review helpful
                    This customer chose to rate the product and not provide text.
                    by
                    • Verified Purchase
                    Measure before buying!
                    Bring a tape measure if you are buying this. First time I got one was only 35 and a half inches. Not really good with a 36 inch door. Went back with a tape measure. Picked one off the shelf and it was 35 and three quarters. Picked up another one and it was 36 and a quarter.
                    by
                    Response from MDBuildingProductsSupportJan 2, 2025
                    Thank you for your review. We hate to hear the product did not meet your expectations; we will pass your feedback on to our quality team to review.
                      • Recommended
                      5 found this review helpful
                      Lasted Only 6 Months
                      Put this on my front door 6 months ago and the plastic sweeps are already coming off.
                      by
                      Response from MDBuildingProductsSupportJul 30, 2024
                      Thank you for your review. We hate to hear the product did not meet your expectations, please call our customer service at 800-654-8454 so we can discuss other options or offer a replacement.
                        6 found this review helpful
                        It did not fit my door the way it it is supposed to and I couldn’t close my door. I had to return it and used a different product. The door has glass in it and maybe that makes it a fraction of an inch too wide for this item. Just be aware that if your door has glass in it, this product has a good chance of not fitting.
                        by
                        • Verified Purchase
                        1 found this review helpful
                        Showing 1-10 of 1,566 reviews

                        Compare Key Features

                        current item

                        Product Snapshot

                        Ideal for sealing exterior doors against drafts, moisture, dust, and insects, saving energy and easy slide-on installation.
                        Ideal for sealing exterior doors against drafts, moisture, dust, and insects, saving energy and money.
                        Ideal for reducing light and sound under interior doors, with easy slide-on installation and adjustable seals for various floor types.
                        Ideal for sealing exterior doors against drafts, moisture, dust, and insects, saving energy and providing a physical barrier against bugs.

                        Adjustable Height

                        Weather Resistance

                        Soundproofing Capability

                        Thermal Insulation

                        Insect and Rodent Barrier