---
product_id: 256128197
title: "M-D Building Products 71480 1/2-Inch by 20-Feet Backer Rod,"
brand: "m-d building products"
price: "131.46 DT"
currency: TND
in_stock: true
category: "M D Building Products"
url: https://www.desertcart.tn/products/256128197-m-d-building-products-71480-1-2-inch-by-20
store_origin: TN
region: Tunisia
---

# Waterproof polyethylene foam 0.5-inch max gap fill 20 feet continuous length M-D Building Products 71480 1/2-Inch by 20-Feet Backer Rod,

**Brand:** m-d building products
**Price:** 131.46 DT
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal smarter, not harder — the pro’s secret to flawless finishes!

## Quick Answers

- **What is this?** M-D Building Products 71480 1/2-Inch by 20-Feet Backer Rod, by m-d building products
- **How much does it cost?** 131.46 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/256128197-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

- • **Seal Like a Pro:** Effortlessly fills large gaps up to 1/2 inch to block drafts and boost energy efficiency.
- • **Endless Coverage:** Generous 20-foot length ensures you have enough material for multiple projects without constant reordering.
- • **Durable & Waterproof:** Made from resilient polyethylene foam that stands up to moisture and weather for long-lasting performance.
- • **Trusted & Top-Ranked:** Highly rated with 4.6 stars and a top 150 rank in raw building materials—join thousands of pros who rely on it.
- • **Perfect Caulking Base:** Creates a smooth, sound surface that enhances caulk adhesion and finish quality every time.

## Overview

The M-D Building Products 71480 Backer Rod is a 1/2-inch thick, 20-foot long polyethylene foam rod designed to fill large gaps and provide a waterproof, sound surface for caulking. Lightweight and easy to use, it prevents drafts and enhances caulk durability, making it a top-rated choice among building professionals and DIY enthusiasts alike.

## Description

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

## Features

- The product is 1/2"x20' Caulk Back Rod
- Easy to use
- The product is manufactured in China
- Fills large gaps and openings to prevent drafts
- Provides a sound surface for caulking projects

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000BQWOC0 |
| Best Sellers Rank | #70,815 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #138 in Raw Building Materials |
| Brand Name | M-D Building Products |
| Color | Gray |
| Customer Reviews | 4.6 4.6 out of 5 stars (3,838) |
| Global Trade Identification Number | 00043374714807 |
| Item Form | Foam |
| Item Type Name | Backer Rod |
| Item Weight | 0.02 Pounds |
| Manufacturer | M-D Building Products |
| Material Type | Polyethylene (PE) |
| Maximum Gap Fill | 0.5 Inches |
| Model | 71480 |
| Number of Items | 1 |
| Part Number | 71480 |
| Surface Recommendation | wall |
| UPC | 043374714807 |
| Unit Count | 1.0 Count |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** M-D Building Products
- **Colour:** Gray
- **Item form:** Foam
- **Item weight:** 0.02 Pounds
- **Maximum gap fill:** 0.5 Inches

## Images

![M-D Building Products 71480 1/2-Inch by 20-Feet Backer Rod, - Image 1](https://m.media-amazon.com/images/I/61UnawlcwQL.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.

## 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 Tunisia*
*Store origin: TN*
*Last updated: 2026-07-21*