---
product_id: 334455983
title: "M-D Building Products 71551 Backer Rod"
brand: "m-d building products"
price: "815.49 DT"
currency: TND
in_stock: true
reviews_count: 5
category: "M D Building Products"
url: https://www.desertcart.tn/products/334455983-m-d-building-products-71551-backer-rod
store_origin: TN
region: Tunisia
---

# 35 PSI tensile strength 0.5 inch max gap fill 20 ft length coverage M-D Building Products 71551 Backer Rod

**Brand:** m-d building products
**Price:** 815.49 DT
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal smart, save time — the pro’s secret to flawless finishes!

## Quick Answers

- **What is this?** M-D Building Products 71551 Backer Rod by m-d building products
- **How much does it cost?** 815.49 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/334455983-m-d-building-products-71551-backer-rod)

## 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 Coverage:** Generous 20-foot length lets you tackle multiple projects without constant reordering.
- • **Durable Foam Material:** Flexible yet resilient foam withstands pressure without tearing, maintaining shape for lasting results.
- • **Precision Gap Filling:** Perfectly compresses to seal gaps up to 1/2 inch, ensuring a flawless caulking base.
- • **Effortless Installation:** Lightweight and easy to cut, ideal for pros and DIYers aiming for clean, professional finishes.
- • **Water Resistant Performance:** Built to resist moisture, protecting your joints and surfaces from weather damage.

## Overview

The M-D Building Products 71551 Backer Rod is a 20-foot flexible foam rod designed to fill and seal gaps up to 1/2 inch wide. With a tensile strength of 35 PSI and water-resistant acrylic silicone material, it provides a durable, compressible base for caulking on general construction surfaces. Lightweight and easy to handle, it ensures efficient, clean sealing for both professional and DIY projects.

## Description

M-D Building Products 71551 Backer Rod

Review: Easy to Work With and Effective for Filling Gaps - This backer rod works well for sealing larger gaps and preparing joints before applying caulk or sealant. The foam material is flexible and easy to press into cracks, expansion joints, and uneven spaces without tearing apart during installation. It compresses nicely to create a solid base for caulking, which helps reduce wasted sealant and gives a cleaner finished result. The 1/2 inch thickness is useful for common concrete gaps and smaller repair jobs around the house or garage. The material feels lightweight but durable enough to hold its shape once installed, and the 20 foot length provides enough coverage for multiple projects. It is simple to cut to size and easy to handle even for someone without much repair experience. Considering the ease of use, effectiveness, and the amount included, it offers good value for the money for home sealing and crack filling projects.
Review: Quality is Good but cost is too much - Cost is too much.. Similar products are available in lowest prices..

## Features

- Item Weight: 1.15 lb
- Country of Origin: China
- Color: NULL
- Brand name: M-D Building Products

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00C1TGKZW |
| Best Sellers Rank | #102,654 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #210 in Raw Building Materials |
| Brand | M-D Building Products |
| Brand Name | M-D Building Products |
| Color | Grey |
| Colour | Grey |
| Customer Reviews | 4.6 out of 5 stars 3,874 Reviews |
| Global Trade Identification Number | 00043374715514 |
| Included Components | Backer Rod |
| Item Form | Foam |
| Item Type Name | Backer Rod |
| Item Weight | 0.01 Ounces |
| Item form | Foam |
| Item weight | 0.01 Ounces |
| Manufacturer | M-D Building Products |
| Material Type | Acrylic Silicone |
| Maximum Gap Fill | 0.5 Inches |
| Maximum gap fill | 0.5 Inches |
| Model | MD Building - 71551 |
| Number of Items | 1 |
| Part Number | 4962239 |
| Surface Recommendation | General Construction Surfaces |
| Surface recommendation | General Construction Surfaces |
| Tensile Strength | 35 Pounds Per Square Inch |
| UPC | 043374715514 |
| Unit Count | 1.0 Count |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** M-D Building Products
- **Colour:** Grey
- **Item form:** Foam
- **Item weight:** 0.01 Ounces
- **Maximum gap fill:** 0.5 Inches

## Images

![M-D Building Products 71551 Backer Rod - Image 1](https://m.media-amazon.com/images/I/61UnawlcwQL.jpg)
![M-D Building Products 71551 Backer Rod - Image 2](https://m.media-amazon.com/images/I/81zeuR+Nj2L.jpg)
![M-D Building Products 71551 Backer Rod - Image 3](https://m.media-amazon.com/images/I/818J6gOM3ZL.jpg)
![M-D Building Products 71551 Backer Rod - Image 4](https://m.media-amazon.com/images/I/81Py1S2524L.jpg)
![M-D Building Products 71551 Backer Rod - Image 5](https://m.media-amazon.com/images/I/81-xBTntOuL.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

### ⭐⭐⭐⭐⭐ Easy to Work With and Effective for Filling Gaps
*by A***M on 19 May 2026*

This backer rod works well for sealing larger gaps and preparing joints before applying caulk or sealant. The foam material is flexible and easy to press into cracks, expansion joints, and uneven spaces without tearing apart during installation. It compresses nicely to create a solid base for caulking, which helps reduce wasted sealant and gives a cleaner finished result. The 1/2 inch thickness is useful for common concrete gaps and smaller repair jobs around the house or garage. The material feels lightweight but durable enough to hold its shape once installed, and the 20 foot length provides enough coverage for multiple projects. It is simple to cut to size and easy to handle even for someone without much repair experience. Considering the ease of use, effectiveness, and the amount included, it offers good value for the money for home sealing and crack filling projects.

### ⭐⭐⭐⭐⭐ 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..

### ⭐⭐⭐⭐⭐ just what I expected.
*by R***Z on 12 May 2026*

Ideal solution for one of my projects. Happy to find higher volume package at good price. M-D Building Products came through yet again for me.

## Frequently Bought Together

- M-D Building Products - Versatile Gray Foam Backer Rod - Set 1/2in x 250ft - Essential Caulk Saver for Sealing Concrete Gaps, Expansion Joints, and Crack Filling (71551)
- M-D Building Products - Versatile Gray Foam Backer Rod - Set 3/8in x 350ft - Essential Caulk Saver for Sealing Concrete Gaps, Expansion Joints, and Crack Filling (71550)
- zzhxkjhky 3/4' Diameter x 80' Length Backer Rod Caulk Saver Foam Backer Rod for Gaps and Joints Backing Concrete Filler

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-07-07*