M-D Building Products 43820 36 in. Beige Vinyl Concealed Kerf/Channel Fit Under Door Seal
M-D Building Products 43820 36 in. Beige Vinyl Concealed Kerf/Channel Fit Under Door Seal
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M-D Building Products

M-D Building Products 43820 36 in. Beige Vinyl Concealed Kerf/Channel Fit Under Door Seal

4.4 stars out of 26 reviews
(4.4)|
26 ratings

Key item features

  • Durable Vinyl Construction: Made of rigid and flexible vinyl for long-lasting use.
  • Effective Sealing: Provides a seal between the bottom of the door and threshold to protect against drafts, moisture, dust, and insects.
  • Energy Efficient: Helps save on energy by reducing heat or air conditioning loss through the bottom of the door.
  • Standard Fit: Fits standard 1-3/4 inch thick exterior doors and can be cut to the desired length with a hacksaw.
  • Concealed Design: Less visible than most under door seals, offering a more concealed look.
  • Pre-Hung Door Replacement: Ideal for replacing under door seals on pre-hung doors; requires door removal for installation.
  • Beige Color: Comes in a neutral beige color to blend with most door finishes.
  • Dimensions: Measures 36 inches in length, 1-3/4 inches in width, and 1/2 inch in height.
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4.4 out of 5 stars
stars26 ratings22 reviews
How item rating is calculated
  1. 5 stars62% (16)
  2. 4 stars27% (7)
  3. 3 stars8% (2)
  4. 2 stars0% (0)
  5. 1 star4% (1)

Reviews summary

Pros
  • : Doors have a secure fit on exterior doors.
  • : Made with materials that meet expectations.
  • : Offers good quality at a lower cost.
  • : Has a sleek look that fits well under the door.
  • : Blends well with surroundings.
  • : Forms a secure closure around the door.
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Showing 1-3 of 22 reviews

Sep 21, 2025
kugiej
Top Reviewer
Sold and shipped byM.O.S. Hardware
5 out of 5 stars review

Verified Purchase

No Leaks

These fit perfectly on all our exterior doors. I had to cut about 1/8 inch off each end to fit a standard 36 inch door. You can cut the non kerf area with scissors. Easy installation. No more air leaks.

Incentivized Review
Helpful?6XREIL8Z5T8I23331692
Dec 10, 2025
Holly
Sold and shipped byM.O.S. Hardware
5 out of 5 stars review

Verified Purchase

Works

Easy to install. Works wonders!

Incentivized Review
Helpful?6XREIL8Z5T8I23331692
Jan 27, 2023
Walmart customer
5 out of 5 stars review

Verified Purchase

Nice fix for a seal

I received product reimbursement in exchange for my honest review. This is a great way to revamp door seals. The channel fit is nice since you don't have to screw anything on. The seal part is plenty thick and glides easily along my tile floors. The beige color is true to what I expected.

Helpful?6XREIL8Z5T8I23331692