M-D Building Products 40717 36 in. White Vinyl DENY™ U-Shape Slide-On Under Door Seal
M-D Building Products 40717 36 in. White Vinyl DENY™ U-Shape Slide-On Under Door Seal
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M-D Building Products

M-D Building Products 40717 36 in. White Vinyl DENY™ U-Shape Slide-On Under Door Seal

4.4 stars out of 12 reviews
(4.4)|
12 ratings
M-D Building Products 40717 36 in. White Vinyl DENY™ U-Shape Slide-On Under Door SealM D Building Products 40717 36 in White Vinyl DENY U Shape Slide On Under Door Seal36 in Black Vinyl DENY U Shape Slide On Under Door SealM D Building Products 40718 36 in Brown Vinyl DENY U Shape Slide On Under Door Seal
Actual Color:White
Black, $26.18
Brown, $20.47
selected, White, $18.45

Key item features

  • Durable Construction: Made from a combination of rigid and flexible vinyl, this under door seal is designed for durability and effective sealing.
  • Protective Barrier: It creates a seal between the door bottom and threshold, guarding against drafts, moisture, dust, and insects.
  • Energy Savings: By sealing the bottom of the door, it helps to reduce the loss of heat or air conditioning, contributing to energy efficiency.
  • Integrated Defense: The vinyl fins are permanently embedded with a natural abrasive, providing a physical barrier against bugs.
  • Simple Installation: This U-shape slide-on seal features a compression fit for secure placement and can be cut to the desired length with a hacksaw.
  • Product Dimensions: The seal measures 36 inches in length, 2 inches in width, and 1-3/4 inches in height, and comes in a white color.
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Current price is $18.45
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Columbus, 43215
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4.4 out of 5 stars
stars12 ratings8 reviews
How item rating is calculated
  1. 5 stars75% (9)
  2. 4 stars8% (1)
  3. 3 stars8% (1)
  4. 2 stars0% (0)
  5. 1 star8% (1)

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Showing 1-3 of 8 reviews

Dec 21, 2025
Andrew
Item details
Color: White
5 out of 5 stars review

Verified Purchase

keeps the heat in and is durable

I installed this same product several years ago and it has worn out from all the use of the door because it is my front door. so I'm getting a new one because the old one is pretty worn out. I feel like it is quite durable though and that's why I got another one of the same kind. It also does a great job keeping the heat in my home during the winter which is the main reason I got it. The plastic is pretty thick so they are a bit challenging to cut to size - I will probably use my angle grinder which is what I believe I used last time, or a multi-tool saw would work fine too.

Incentivized Review
Helpful?2CBJY7WPGV77639116641
Feb 1, 2026
ERIC
Item details
Color: White
5 out of 5 stars review

Verified Purchase

This is great. The install is basically instant. If it's too long for your door, you just cut it. But, be careful how you cut it so you don't have one edge end to jaggedy looking. Keeps everything from crossing, entering through what would otherwise be a hole, including dust, pet hair, and odors.

Incentivized Review
Helpful?2CBJY7WPGV77639116641
Dec 12, 2025
Julie
Item details
Color: White
5 out of 5 stars review

Verified Purchase

No More cold air coming under my door

Perfect solution to my cold air leaky door.

Incentivized Review
Helpful?2CBJY7WPGV77639116641