M-D Building Products 43336 36 in. White Vinyl CINCH® U-Shape Slide-On Under Door Seal
M-D Building Products 43336 36 in. White Vinyl CINCH® U-Shape Slide-On Under Door Seal
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M-D Building Products

M-D Building Products 43336 36 in. White Vinyl CINCH® U-Shape Slide-On Under Door Seal

4.2 stars out of 198 reviews
(4.2)|
198 ratings
M-D Building Products 43336 36 in. White Vinyl CINCH® U-Shape Slide-On Under Door SealM D Building Products 43336 36 in White Vinyl CINCH U Shape Slide On Under Door SealM D Building Products 43337 36 in Brown Vinyl CINCH U Shape Slide On Under Door Seal
Actual Color:White
Brown, $14.97, was $16.98
$16.98
selected, White, $14.97

Key item features

  • Durable Vinyl: Made of rigid and flexible vinyl for long-lasting use
  • Effective Seal: 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
  • Easy Installation: No drilling or screws required; simply slides onto the door with a compression fit
  • Customizable Length: Can be cut to the desired length using a hacksaw
  • Standard Fit: Fits standard 1-3/4 inch thick exterior doors
  • Dimensions: Measures 36 inches in length, 2 inches in width, and 1-3/4 inches in height
  • White Finish: Features a clean, white color to match most door styles
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Current price is $14.97
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Customer ratings & reviews

4.2 out of 5 stars
stars198 ratings81 reviews
How item rating is calculated
  1. 5 stars68% (134)
  2. 4 stars12% (24)
  3. 3 stars6% (12)
  4. 2 stars2% (4)
  5. 1 star12% (24)

Reviews summary

Pros
  • : Forms a snug fit around the door.
  • : Prevents cold air from entering through the door.
  • : Offers lower price point compared to others.
  • : Provides a secure seal around the area.
  • : Simple setup process with minimal effort required.
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Showing 1-3 of 81 reviews

Mar 20, 2026
melanie
Item details
Color: Brown
5 out of 5 stars review

Verified Purchase

Great product to seal door

Great product. Better made than I thought it would be for the price. Recommended to anyone needing to seal your door. I only dropped a stay for easy installation. You may need help installing to tap it on with a hammer. I used a hammer, cardboard and every bit of strength I had with bad wrists and tendinitis but I made it work. It fits like a tight glove and seals better than the original seal we had on it

Helpful?6CYMUX08OL2C195997122
Feb 19, 2026
Terry
Item details
Color: White
Sold and shipped bySupply the Home
5 out of 5 stars review

Verified Purchase

I live in an old house and the door frames are no longer square angles. this product has blocked the gap under the door nicely even with it growing from one side to the other

Helpful?6CYMUX08OL2C195997122
Dec 14, 2025
eric
Top Reviewer
Item details
Color: Brown
5 out of 5 stars review

Verified Purchase

Excellent product for a windy hallway

This definitely a two-person project. My Wife Christina tremendously helpful since we had to hold the door open and whack the length of 34 inches with a hammer against a 2/4 to get it in place. Then saw off the excess. But does the job!!!

Helpful?6CYMUX08OL2C195997122