---
product_id: 216485030
title: "M-D Building Products 71480 1/2-Inch by 20-Feet Backer Rod, Gray"
brand: "m-d building products"
price: "$U994"
currency: UYU
in_stock: false
reviews_count: 7
category: "M D Building Products"
url: https://www.desertcart.uy/products/216485030-m-d-building-products-71480-1-2-inch-by-20
store_origin: UY
region: Uruguay
---

# Easily trim to size Waterproof & weather-resistant 0.5-inch max gap fill M-D Building Products 71480 1/2-Inch by 20-Feet Backer Rod, Gray

**Brand:** m-d building products
**Price:** $U994
**Availability:** ❌ Out of Stock

## Summary

> 🔧 Seal smart, live comfortable — the pro’s choice for lasting gap defense!

## Quick Answers

- **What is this?** M-D Building Products 71480 1/2-Inch by 20-Feet Backer Rod, Gray by m-d building products
- **How much does it cost?** $U994 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/216485030-m-d-building-products-71480-1-2-inch-by-20)

## 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

- • **Customizable Fit:** Trim or twist to perfectly match any gap size, ensuring a flawless seal every time
- • **Precision Gap Filling:** Seals medium gaps up to 0.5 inches for airtight, draft-free spaces
- • **All-Weather Durability:** Crafted from waterproof foam that withstands rain, sun, and temperature swings
- • **Effortless Installation:** Push-in design fits snugly—no adhesives or mess required
- • **Versatile Home Solution:** Ideal for windows, doors, driveways, and concrete joints to boost insulation and durability

## Overview

The M-D Building Products 71480 Backer Rod is a 20-foot roll of high-quality, gray foam designed to fill gaps up to 0.5 inches. Waterproof and weather-resistant, it provides a durable base for caulking in both indoor and outdoor applications. Easy to install and trim, it enhances insulation, prevents drafts, and strengthens joint adhesion for long-lasting home weatherization.

## Description

M-D Building Products 71480 1/2-Inch by 20-Feet Backer Rod, Gray

Review: Quality is Good but cost is too much - Cost is too much.. Similar products are available in lowest prices..
Review: Excellent stuff. - All Doggy people should use this ,who post their puppy's ears.Excellent stuff.

## Features

- Quality Construction: This gap filler is made from high-quality, weather-resistant materials, ensuring long-lasting durability and performance. It effectively seals medium gaps between surfaces, preventing drafts and dust from entering your home. Suitable for both indoor and outdoor use, it withstands various weather conditions, providing consistent protection and improved comfort.
- Concrete Gap Filling Excellence: Our product excels in filling concrete gaps, creating a strong foundation for caulking projects. Utilize this foam to effectively fill joints between surfaces, ensuring dependable adhesion for caulking applications that promise enduring durability and resilience.
- Complete Gap Solution: This product provides versatile gap filling, preventing drafts and offering a sturdy base for caulking. Perfect for expansion joints in driveways and sidewalks, it can be twisted for larger gaps and easily trimmed with scissors to the desired size.
- Effortless Installation: Enjoy a hassle-free setup by effortlessly pushing the backer rod into most joint openings until it fits snugly. Once installed, enhance the seal further by applying caulk on top—no need for messy sealants or adhesives.
- Versatile Application: From repairing leaky roofs and window sills to addressing drafty doors, the Backer Rod is your go-to solution! Beyond sealing surface gaps, it excels in insulating, enhancing airtightness, and damp-proofing your home—offering multifaceted benefits for various household needs.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000BQWOC0 |
| Best Sellers Rank | #289,336 in Home Improvement ( See Top 100 in Home Improvement ) #2,143 in Weather Stripping |
| Brand | M-D Building Products |
| Colour | Gray |
| Global Trade Identification Number | 00043374714807 |
| Included Components | 1 Foam Backer Rod Roll |
| Item Dimensions LxWxH | 30.5 x 22.2 x 5.1 Centimeters |
| Item Form | Foam |
| Item Weight | 9.07 g |
| Item model number | 71480 |
| Manufacturer | M-D Building Products |
| Material | Foam |
| Maximum Gap Fill | 0.5 Inches |
| Net Quantity | 1.0 Count |
| Number of Items | 1 |
| Product Dimensions | 30.48 x 22.23 x 5.08 cm; 9.07 g |
| Surface Recommendation | wall |
| UPC | 043374714807 |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** M-D Building Products
- **Colour:** Gray
- **Item Form:** Foam
- **Item Weight:** 9 g
- **Maximum Gap Fill:** 0.5 Inches

## Images

![M-D Building Products 71480 1/2-Inch by 20-Feet Backer Rod, Gray - Image 1](https://m.media-amazon.com/images/I/413DabwbHsL.jpg)
![M-D Building Products 71480 1/2-Inch by 20-Feet Backer Rod, Gray - Image 2](https://m.media-amazon.com/images/I/4141cO3izOL.jpg)
![M-D Building Products 71480 1/2-Inch by 20-Feet Backer Rod, Gray - Image 3](https://m.media-amazon.com/images/I/513MLxKGdlL.jpg)
![M-D Building Products 71480 1/2-Inch by 20-Feet Backer Rod, Gray - Image 4](https://m.media-amazon.com/images/I/51E5E0vYkLL.jpg)
![M-D Building Products 71480 1/2-Inch by 20-Feet Backer Rod, Gray - Image 5](https://m.media-amazon.com/images/I/51SblrTei7L.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Is it safe to use near hot water baseboard radiators? I want to use it behind radiator cover as a temporary fix for a cold draft.**
A: I suspect it would be safe if between the wall and the top cover of the baseboard, assuming you have standard baseboard covers like mine -- which never get super hot. It's foam, and will likely melt if too close to a heat source. To be on the safe side, I'd suggest first contacting the company directly.

**Q: Can you use barge glue and plastidip**
A: Call the manufacturer

**Q: I live in an apartment and i feel a draft coming through the cracks of my window would this help? Im trying to avoid using weather tape**
A: I purchased the medium backer rod and they are 1/2" thick. I think the one I purchased would be too thick to insert into the crack of your windows.  Maybe there is a smaller version that would work for you.

**Q: What caulking do u need for this ?**
A: I did use caulk as it was used to support a garage door seal as the bottom of the door.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Quality is Good but cost is too much
*by R***I on 23 November 2018*

Cost is too much.. Similar products are available in lowest prices..

### ⭐⭐⭐⭐⭐ Excellent stuff.
*by D***H on 17 March 2018*

All Doggy people should use this ,who post their puppy's ears.Excellent stuff.

### ⭐⭐⭐⭐⭐ Review
*by T***D on 15 November 2025*

Though intended for sealing concrete gaps, this M-D Foam Backer Rod is an absolute game-changer for Doberman owners using DIY methods for ear posting. ​Perfect Density & Size: The 1/2 inch size and density are ideal for creating a stable, lightweight, and comfortable post core that is custom-cut to fit the ear canal perfectly. ​How to Use: The key to success is modification! It worked perfectly when wrapped in duct tape (or Zonas tape) to give it a firm, smooth exterior. This combination creates a far superior post than many specialized materials. ​Value: With 20 feet of material, this set offers incredible value, providing enough post material to last through the entire posting process for one or more puppies. ​If you are posting Doberman, Great Dane, or Boxer ears, forget the expensive custom kits—this backer rod, wrapped in tape, is the professional-level core you need. Highly, highly recommend!

## Frequently Bought Together

- M-D Building Products - Versatile Gray Foam Backer Rod Set 1/2in x 20ft - Essential Caulk Saver for Sealing Concrete Gaps, Expansion Joints, and Crack Filling (71480)
- M-D Building Products - Versatile Gray Foam Backer Rod - Essential Caulk Saver for Sealing Concrete Gaps, Expansion Joints, and Crack Filling, 3/8 by 20 Feet, (Pack of 2) (71464)
- Sikaflex Self Leveling Sealant, Gray, polyurethane with an accelerated curing capacity for sealing horizontal expansion joints in concrete, 10.1 fl. oz Cartridge

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*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-03-10*