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

4.2 stars out of 158 reviews
(4.2)|
158 ratings

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 $13.38
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Columbus, 43215
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Customer ratings & reviews

4.2 out of 5 stars
stars158 ratings68 reviews
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Reviews summary

Pros
  • : Can be cut to fit door width with basic tools.
  • : Forms a snug fit around the door.
  • : Made with flexible flaps and features that can be adjusted.
  • : Prevents cold air and bugs from entering.
  • : Offers lower price point compared to others.
  • : Provides a secure seal around the area.
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Showing 1-3 of 68 reviews

Dec 14, 2025
eric
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
Nov 15, 2024
Will
Item details
Color: Brown
Sold and shipped bySupply the Home
5 out of 5 stars review

Verified Purchase

Well made, designed for snug fit trim/saw to size

Trim to size of door with a hand saw of some Type (I used a hacksaw.) then slide it on to bottom of open door. Note; the more it slides on the more resistance to moving it became. (To hold it securely in place when on completely.) To push it on: I used a hammer turned sideways to tap-apply even pressure on the side to avoid any possible impact damage to finish sliding it in place. I would buy it again.

Helpful?6CYMUX08OL2C195997122
reply from MDBuildingProductsSupport

Thank you for your review. We are glad to hear that you are enjoying your product!

Oct 10, 2024
Renee
Top Reviewer
Item details
Color: White
4 out of 5 stars review

Verified Purchase

Would work well without a rug

I thought this would be a great solution to a large gap under my door where the threshold was already raised as high as it would go. And it would have, except for the fact that we have a rug at the door to try and minimize the dirt from the husband's shoes. Seems made well enough and it was my own fault it wouldn't work for me.

Helpful?6CYMUX08OL2C195997122