---
product_id: 57994352
title: "M-D Building Products Vinyl Cinch U-Shape Door Bottom Seal, Slide-On Weatherstripping Draft Stopper, Easy to Install, Fits 36” x 1-3/4” Doors, Fills 3/8”- 3/4” Gaps, 43337, Brown"
brand: "m-d building products"
price: "R$384"
currency: BRL
in_stock: true
reviews_count: 13
category: "M D Building Products"
url: https://www.desertcart.com.br/products/57994352-m-d-building-products-vinyl-cinch-u-shape-door-bottom
store_origin: BR
region: Brazil
---

# Durable vinyl reduces energy waste & bills Seals 3/8”–3/4” gaps to block drafts & dust Slide-on U-shape design for effortless DIY install M-D Building Products Vinyl Cinch U-Shape Door Bottom Seal, Slide-On Weatherstripping Draft Stopper, Easy to Install, Fits 36” x 1-3/4” Doors, Fills 3/8”- 3/4” Gaps, 43337, Brown

**Brand:** m-d building products
**Price:** R$384
**Availability:** ✅ In Stock

## Summary

> 🚪 Seal the deal on comfort and savings—your door’s new best friend!

## Quick Answers

- **What is this?** M-D Building Products Vinyl Cinch U-Shape Door Bottom Seal, Slide-On Weatherstripping Draft Stopper, Easy to Install, Fits 36” x 1-3/4” Doors, Fills 3/8”- 3/4” Gaps, 43337, Brown by m-d building products
- **How much does it cost?** R$384 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/57994352-m-d-building-products-vinyl-cinch-u-shape-door-bottom)

## Best For

- m-d building products enthusiasts

## Why This Product

- Trusted m-d building products brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Energy Bill Slayer:** Cut heating and cooling costs by preventing air leaks—because saving money never goes out of style.
- • **Precision Gap Filling:** Seamlessly fills 3/8” to 3/4” gaps, locking out drafts and noise for year-round comfort.
- • **Noise-Reducing Barrier:** Create your quiet zone by blocking unwanted street and office noise with every door close.
- • **Durable Vinyl Construction:** Built to last through weather extremes, ensuring long-term savings and peace of mind.
- • **Effortless Slide-On Installation:** No tools, no hassle—upgrade your door seal in minutes and join the energy-smart crowd.

## Overview

The M-D Building Products Vinyl Cinch U-Shape Door Bottom Seal is a durable, easy-to-install weatherstripping solution designed to fit standard 36” x 1-3/4” doors. It effectively seals gaps from 3/8” to 3/4”, blocking drafts, dust, and noise while enhancing energy efficiency and reducing HVAC costs. Crafted from high-quality vinyl with a slide-on design, it offers a quick DIY upgrade that withstands daily wear and varying weather conditions.

## Description

Top Solutions for Your Home Visit the Store Top Solutions for Your Home Visit the Store

Review: Not weak or soft vinyl but strong quality. - I'm surprised at how strong the material is! I recommend using a saw, I used an inexpensive ($10-15 at Lowe's or HD) miter saw, or at least use a hack saw. This is not soft or weak plastic that you can cut with a utility knife. This product is functional and easy to install.
Review: Easy install, flexible cutting options (hacksaw OR tin snips) - These replacement door sweeps were much easier to install than I expected 👍 🔧 Installation • Pulled the old sweeps off and used them as a length guide • New ones slid right on with no fuss • Took just a few minutes per door ✂️ Cutting options (worked great for French doors) • We cut one with a hacksaw, as recommended • For the second sweep, we used tin snips instead and it worked perfectly • Tin snips were especially helpful because this was a French door where the trim between the doors doesn’t touch the ground • The outside piece fit neatly over the trim, while the inside covered the gap 🚪 Fit & function • Covered gaps well • Sealed nicely at the bottom • Everything lined up cleanly once installed Overall, these are very easy to use, forgiving if your door setup isn’t perfectly standard, and worked well with both a hacksaw and tin snips. If you’re replacing worn door sweeps, this is a straightforward, DIY-friendly option.

## Features

- Superior Weatherproofing: Enhance your home's insulation with the Vinyl Cinch U-Shape Slide-On Under Door Seal. This innovative design effectively blocks drafts and dust, maintaining a comfortable indoor temperature year-round. Made from high-quality vinyl, it ensures a tight seal under your door, reducing energy consumption and lowering heating and cooling costs.
- Durable & Long-Lasting: Crafted from robust vinyl material, the under door seal is designed to withstand daily wear and tear. Its durable construction ensures long-term performance, making it a reliable solution for door sealing needs. Regardless of varying weather conditions, this under door seal remains intact and effective, providing consistent protection and maintaining its integrity over time.
- Easy Installation: The slide-on U-shape design allows for quick and simple attachment to the bottom of your door, without the need for special tools or professional assistance. This user-friendly feature makes it an excellent choice for DIY enthusiasts and homeowners looking to improve their home's efficiency. The seal fits snugly onto standard doors, ensuring a secure and seamless fit that enhances its performance.
- Noise Reduction: The under door seal not only protects against drafts but also acts as an effective noise blocker. This feature is particularly beneficial for homes and offices located in busy areas, where reducing noise levels can significantly enhance comfort and productivity. By creating a sound barrier at the bottom of your door, this seal helps to minimize the intrusion of unwanted noise, ensuring a quieter and more serene indoor environment.
- Energy Efficiency: Improve your home's energy efficiency with the M-D Building Products Cinch Under Door Seal. By effectively sealing gaps under doors, it prevents the loss of heated or cooled air, allowing your HVAC system to operate more efficiently. This results in lower energy bills and a reduced carbon footprint, contributing to a more sustainable and cost-effective living environment.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00PKSFEAI |
| Best Sellers Rank | #1,907 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #52 in Door Hardware & Locks |
| Brand | M-D Building Products |
| Brand Name | M-D Building Products |
| Color | Brown |
| Customer Reviews | 4.2 out of 5 stars 7,185 Reviews |
| Global Trade Identification Number | 00043374433371 |
| Included Components | MD Building - 43337 |
| Item Dimensions L x W | 36"L x 2"W |
| Item Thickness | 1.75 Inches |
| Item Type Name | MD Building - 43337 |
| Item Weight | 0.71 Pounds |
| Manufacturer | M-D Building Products |
| Manufacturer Part Number | 43337 |
| Manufacturer Warranty Description | Warranty |
| Material | Vinyl |
| Material Type | Vinyl |
| Model Number | MD Building - 43337 |
| Number of Items | 1 |
| Product Dimensions | 36"L x 2"W |
| Recommended Uses For Product | door |
| UPC | 043374433371 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** M-D Building Products
- **Color:** Brown
- **Item Thickness:** 1.75 Inches
- **Material:** Vinyl
- **Product Dimensions:** 36"L x 2"W

## Images

![M-D Building Products Vinyl Cinch U-Shape Door Bottom Seal, Slide-On Weatherstripping Draft Stopper, Easy to Install, Fits 36” x 1-3/4” Doors, Fills 3/8”- 3/4” Gaps, 43337, Brown - Image 1](https://m.media-amazon.com/images/I/61iepv0isGL.jpg)
![M-D Building Products Vinyl Cinch U-Shape Door Bottom Seal, Slide-On Weatherstripping Draft Stopper, Easy to Install, Fits 36” x 1-3/4” Doors, Fills 3/8”- 3/4” Gaps, 43337, Brown - Image 2](https://m.media-amazon.com/images/I/71MbAqQgTkL.jpg)
![M-D Building Products Vinyl Cinch U-Shape Door Bottom Seal, Slide-On Weatherstripping Draft Stopper, Easy to Install, Fits 36” x 1-3/4” Doors, Fills 3/8”- 3/4” Gaps, 43337, Brown - Image 3](https://m.media-amazon.com/images/I/81rlRtK+5gL.jpg)
![M-D Building Products Vinyl Cinch U-Shape Door Bottom Seal, Slide-On Weatherstripping Draft Stopper, Easy to Install, Fits 36” x 1-3/4” Doors, Fills 3/8”- 3/4” Gaps, 43337, Brown - Image 4](https://m.media-amazon.com/images/I/81uHPynon5L.jpg)
![M-D Building Products Vinyl Cinch U-Shape Door Bottom Seal, Slide-On Weatherstripping Draft Stopper, Easy to Install, Fits 36” x 1-3/4” Doors, Fills 3/8”- 3/4” Gaps, 43337, Brown - Image 5](https://m.media-amazon.com/images/I/714VJRZXtML.jpg)

## Available Options

This product comes in different **Color, Size, Number Of Items** options.

## Questions & Answers

**Q: Can I cut this with a sharp scissor?**
A: The scissors would have to be real sharp and have strong heavy blades like garden shears.  I started the cut with a heavy, sharp kitchen knife and finished it with a small electric hand 
saw. Measure and cut before you put it under the door or it will be too difficult to cut after installation.  This is an excellent product,  so be careful not to ruin it.

**Q: The first product description states the material as Aluminum, Stainless Steel. Can I assume this is incorrect and that it is 100% vinyl?**
A: Yes 100% vinyl

**Q: Will this stop unwanted smells, like cigarettes, from getting inside?**
A: I think it will help, but I'm not sure it would be 100% effective, as cigarette smoke tends to permeate the smallest of spaces.

**Q: Will this work on carpet?**
A: Don't see why not.  Carpet has a little more give than a metal threshold so should be fine.  I have installed 2 of these on front doors of homes and worked great with metal thresholds.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Not weak or soft vinyl but strong quality.
*by E***T on April 29, 2026*

I'm surprised at how strong the material is! I recommend using a saw, I used an inexpensive ($10-15 at Lowe's or HD) miter saw, or at least use a hack saw. This is not soft or weak plastic that you can cut with a utility knife. This product is functional and easy to install.

### ⭐⭐⭐⭐⭐ Easy install, flexible cutting options (hacksaw OR tin snips)
*by F***B on December 16, 2025*

These replacement door sweeps were much easier to install than I expected 👍 🔧 Installation • Pulled the old sweeps off and used them as a length guide • New ones slid right on with no fuss • Took just a few minutes per door ✂️ Cutting options (worked great for French doors) • We cut one with a hacksaw, as recommended • For the second sweep, we used tin snips instead and it worked perfectly • Tin snips were especially helpful because this was a French door where the trim between the doors doesn’t touch the ground • The outside piece fit neatly over the trim, while the inside covered the gap 🚪 Fit & function • Covered gaps well • Sealed nicely at the bottom • Everything lined up cleanly once installed Overall, these are very easy to use, forgiving if your door setup isn’t perfectly standard, and worked well with both a hacksaw and tin snips. If you’re replacing worn door sweeps, this is a straightforward, DIY-friendly option.

### ⭐⭐⭐⭐⭐ Best seal you can buy (price is great also). Installation can be tough.
*by J***N on December 22, 2024*

This gasket is the best you can buy out there (IMHO). I find it is best used if the gap is ½” to ¾”. Less will possibly work, but you may quickly shave off the dangling legs. These can be somewhat hard to install on a 1 ¾” door as the fit is super tight (compression fit). That is why there are no holes for screws. Here is the installation that worked for me (second one installed and lessons learned). 1) The Mark: (if required. Yes, I know it is 36” and so is your door, but trust me). Lay at base of door, flush at one end and mark opposite end at end of door. Trim as below - if length is perfect, skip to 3). 2) The Trim: (lesson learned from installing as is - ¼” extended past the door edge hitting the side frame. Not fun to remove). Use anything you are skilled with: Hack saw, band saw, chain saw or whatever. Here is what I used/did. I used the heavy duty scissors to snip both upstanding legs (as far as I could). I then snipped each dangling leg at the same distance as the upstanding legs. I then used a sharp blade against a small section of 2x4 to cut the bottom – was tough and takes patience / great force. (see cut piece in pics – yes, my door is 36” and I still trimmed off about a ¼”. 3) The Install: Spray Windex on both sides of the lower sides of the door along with a shot that length of the seal (insides). Yes, Windex – as any avid dirt biker knows – lubricates for install and evaporates for a extremely tight seal (like grips on your dirt bike!) Should have bought this stock in the 70’s. 4) The Slide: Before the Windex evaporates, slide the seal from outer end of door (as if you could install any other way). It will be easy for the first 6”, then you will need a gloved (leather preferably) hand to pound it on most of the way. I got it to about to 3-4” left before my palm gave out. From there I used a block of wood (to protect the seal) and a small hammer (yea, the one shown is a tiny tike hammer, but the one I use the most) to tap the seal flush to the door. Now you are almost done. 5) The Pop: More than likely, the seal is up to the bottom of the door. I couldn’t even move my door as it was sealed to the floor. I used a rigid scraper (metal as shown – I have rigid and flexible and had to use the rigid one) sliding under the seal (gently not to damage the dangling fingers) in 6” increments and pulling up (you will hear the pop as it seats with the bottom of your door. I did this to both inside and outside of door. Key: From the Windex spray to the end was done before the Windex dried. Hopefully this helped with the installation.

## Frequently Bought Together

- M-D Building Products 43337 Vinyl Cinch® U-Shape Slide-On Under Door Seal, Easy-to-Install, Energy-Saving, Weatherproof Seal for Doors, Effective Draft Blocker, Ideal for Home (36 Inch, Brown)
- Kerf Weather Stripping Door Seal for Large Gap and Easy Installation (40 Feet, White)
- Weather Stripping Door Seal Strip - Soundproof Q-Shaped Foam for Exterior Door Frame, Large Gap Seal, Noise Cancelling, Easy to Install (Black, 26FT)

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*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-05-22*