---
product_id: 546776365
title: "M-D Building Products 71464 Backer Rod For Gaps and Joints, 3/8-by-20 Feet, Gray"
brand: "m-d building products"
price: "43345CFA"
currency: XOF
in_stock: false
reviews_count: 5
category: "M D Building Products"
url: https://www.desertcart.sn/products/546776365-m-d-building-products-71464-backer-rod-for-gaps-joints
store_origin: SN
region: Senegal
---

# Easily trimmed to fit any joint size Weather-resistant for indoor/outdoor durability 3/8-inch diameter perfect for medium gaps M-D Building Products 71464 Backer Rod For Gaps and Joints, 3/8-by-20 Feet, Gray

**Brand:** m-d building products
**Price:** 43345CFA
**Availability:** ❌ Out of Stock

## Summary

> 🧱 Seal smarter, not harder — your gap-filling game changer!

## Quick Answers

- **What is this?** M-D Building Products 71464 Backer Rod For Gaps and Joints, 3/8-by-20 Feet, Gray by m-d building products
- **How much does it cost?** 43345CFA with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/546776365-m-d-building-products-71464-backer-rod-for-gaps-joints)

## 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

- • **Built to Last:** Crafted from high-quality, weatherproof foam that stands up to rain, sun, and temperature swings.
- • **Seal Like a Pro:** Effortlessly fills and seals medium gaps to block drafts and dust, boosting home comfort.
- • **Versatile Home Hero:** Ideal for sealing expansion joints, driveways, windows, doors, and even roof repairs.
- • **Caulk’s Best Friend:** Creates a sturdy base for caulking, ensuring long-lasting adhesion and crack resistance.
- • **Perfect Fit Every Time:** Flexible and twistable design lets you customize length and thickness for any project.

## Overview

The M-D Building Products 71464 Backer Rod is a 3/8-inch diameter, 20-foot gray foam rod designed to fill medium gaps and joints. Made from durable, weather-resistant rubber foam, it provides a reliable base for caulking, enhances insulation, and prevents drafts and moisture intrusion. Easy to install and trim, it’s perfect for both indoor and outdoor weatherization projects, ensuring long-lasting protection and improved home comfort.

## Description

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)

Review: Great for posting my Dobermans ears thanks x
Review: worked perfectly

## 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 | B000BQS90G |
| Are batteries included? | No |
| Brand | M-D Building Products |
| Colour | Gray |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,522) |
| Date First Available | 25 April 2019 |
| Generic Name | MD Building - 71464 - 2pk |
| Global Trade Identification Number | 00043374714647 |
| Included Components | MD Building - 71464 - 2pk |
| Item Dimensions LxWxH | 35.6 x 20.3 x 5.1 Centimeters |
| Item Form | Foam |
| Item Height | 2 Inches |
| Item Weight | 17 g |
| Item Width | 8 Inches |
| Item model number | 71464 |
| Manufacturer | M-D Building Products |
| Material | Rubber |
| Model number | 71464 |
| Net Quantity | 1.0 Count |
| Number of Items | 1 |
| Product Dimensions | 35.56 x 20.32 x 5.08 cm; 17.01 g |
| Surface Recommendation | wall |
| UPC | 043374714647 |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** M-D Building Products
- **Colour:** Gray
- **Item Form:** Foam
- **Item Weight:** 0.6 Ounces
- **Surface Recommendation:** wall

## Images

![M-D Building Products 71464 Backer Rod For Gaps and Joints, 3/8-by-20 Feet, Gray - Image 1](https://m.media-amazon.com/images/I/31Ul2VFsUVL.jpg)
![M-D Building Products 71464 Backer Rod For Gaps and Joints, 3/8-by-20 Feet, Gray - Image 2](https://m.media-amazon.com/images/I/41WNLhCRuML.jpg)
![M-D Building Products 71464 Backer Rod For Gaps and Joints, 3/8-by-20 Feet, Gray - Image 3](https://m.media-amazon.com/images/I/513MLxKGdlL.jpg)
![M-D Building Products 71464 Backer Rod For Gaps and Joints, 3/8-by-20 Feet, Gray - Image 4](https://m.media-amazon.com/images/I/51E5E0vYkLL.jpg)
![M-D Building Products 71464 Backer Rod For Gaps and Joints, 3/8-by-20 Feet, Gray - Image 5](https://m.media-amazon.com/images/I/51SblrTei7L.jpg)

## Questions & Answers

**Q: how many feet come in a 3 pk?**
A: Both INDIVIDUAL packs - the 3/8" and the 1/2"-  are 20 feet long.

**Q: no 1/4" one? either 20 or 50ft?**
A: Not in this brand, but Amazon offers 1/4-inch backer rod in various lengths, from 10 feet to 100 feet, from other brands. Just search on "Backer Rod 1/4 Inch".

**Q: can the backer rod be sliced for smaller openings?**
A: I have not done that, but it cuts easily with a sharp knife or scissors, so you should be able to slice it to fit whatever opening you have. It's good stuff!

**Q: Can his be used for exterior windows before caulking?**
A: I used it to push into larger cracks in my driveway before applying concrete filler, and it worked great. I'm thinking that it should work well for filling in spaces around your windows prior to caulking.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by B***S on 30 September 2023*

Great for posting my Dobermans ears thanks x

### ⭐⭐⭐⭐⭐ Review
*by A***E on 6 January 2026*

worked perfectly

### ⭐⭐⭐⭐⭐ Review
*by M***Y on 24 October 2025*

Sometimes caulking or spray foam is not appropriate for the job, and is an excellent permanent base fix prior to caulking. Creates no pressure on door and window frames

## Frequently Bought Together

- 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)
- 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)
- 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 Senegal*
*Store origin: SN*
*Last updated: 2026-02-19*