---
product_id: 256128197
title: "M-D Building Products 71480 1/2-Inch by 20-Feet Backer Rod,"
brand: "m-d building products"
price: "€ 28.74"
currency: EUR
in_stock: true
reviews_count: 5
category: "M D Building Products"
url: https://www.desertcart.es/products/256128197-m-d-building-products-71480-1-2-inch-by-20
store_origin: ES
region: Spain
---

# Waterproof polyethylene foam 20 feet length for extensive coverage M-D Building Products 71480 1/2-Inch by 20-Feet Backer Rod,

**Brand:** m-d building products
**Price:** € 28.74
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal smart, save energy, and upgrade your space effortlessly!

## 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?** € 28.74 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/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

- • **Extended Reach:** 20 feet of flexible backer rod ensures you’re covered for any project size.
- • **Seal Like a Pro:** Fills large gaps up to 1/2 inch to block drafts and boost insulation.
- • **Easy Application:** Simple to install, saving you time and hassle on every weatherization job.
- • **Durable & Waterproof:** Made from resilient polyethylene foam that stands up to moisture and time.
- • **Soundproof Your Space:** Creates a solid base for caulking, reducing noise and enhancing comfort.

## 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 openings. Waterproof and durable, it provides an ideal surface for caulking, improving insulation and soundproofing in walls. Trusted by thousands with a 4.6-star rating, it’s a must-have for professional-grade weatherization and home improvement projects.

## Description

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

Review: Quality is Good but cost is too much
Review: makes great insulation

## 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 | #91,120 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #192 in Raw Building Materials |
| Brand | M-D Building Products |
| Brand Name | M-D Building Products |
| Color | Gray |
| Colour | Gray |
| Customer Reviews | 4.6 out of 5 stars 3,763 Reviews |
| Global Trade Identification Number | 00043374714807 |
| Item Form | Foam |
| Item Type Name | Backer Rod |
| Item Weight | 0.02 Pounds |
| Item form | Foam |
| Item weight | 0.02 Pounds |
| Manufacturer | M-D Building Products |
| Material Type | Polyethylene (PE) |
| Maximum Gap Fill | 0.5 Inches |
| Maximum gap fill | 0.5 Inches |
| Surface Recommendation | wall |
| 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:** 9 g
- **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)
![M-D Building Products 71480 1/2-Inch by 20-Feet Backer Rod, - Image 2](https://m.media-amazon.com/images/I/81JSrbnZQ5L.jpg)
![M-D Building Products 71480 1/2-Inch by 20-Feet Backer Rod, - Image 3](https://m.media-amazon.com/images/I/818J6gOM3ZL.jpg)
![M-D Building Products 71480 1/2-Inch by 20-Feet Backer Rod, - Image 4](https://m.media-amazon.com/images/I/81Py1S2524L.jpg)
![M-D Building Products 71480 1/2-Inch by 20-Feet Backer Rod, - Image 5](https://m.media-amazon.com/images/I/81-xBTntOuL.jpg)

## 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*



### ⭐⭐⭐⭐⭐ makes great insulation
*by N***D on 24 January 2025*



### ⭐⭐⭐⭐⭐ Great Quality and Saves Caulk!
*by K***N on 27 February 2026*



## 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 Spain*
*Store origin: ES*
*Last updated: 2026-03-09*