---
product_id: 5587474
title: "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 (71464)"
brand: "m-d building products"
price: "Rp518394"
currency: IDR
in_stock: true
reviews_count: 13
url: https://www.desertcart.id/products/5587474-m-d-building-products-versatile-gray-foam-backer-rod-essential
store_origin: ID
region: Indonesia
---

# Easily trimmed to size Weather-resistant & waterproof 3/8 inch diameter for medium gaps 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 (71464)

**Brand:** m-d building products
**Price:** Rp518394
**Availability:** ✅ In Stock

## Summary

> 🛡️ Seal smart, save more — the ultimate caulk saver for pros and DIYers alike!

## Quick Answers

- **What is this?** 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 (71464) by m-d building products
- **How much does it cost?** Rp518394 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.id](https://www.desertcart.id/products/5587474-m-d-building-products-versatile-gray-foam-backer-rod-essential)

## 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

- • **Multi-Use Home Essential:** Ideal for concrete, expansion joints, insulation, and draft-proofing
- • **Built to Brave the Elements:** Durable, weatherproof material ensures year-round protection
- • **Precision Fit for Every Gap:** Snug 3/8 inch foam diameter seals medium cracks flawlessly
- • **Cut-to-Perfection Convenience:** Trim with scissors for a custom fit every time
- • **Effortless Installation, Instant Results:** Push-in design saves time and avoids messy adhesives

## Overview

The M-D Building Products Versatile Gray Foam Backer Rod is a 3/8 inch diameter, 20-foot long foam rod designed to fill medium gaps in concrete, expansion joints, and cracks. Made from durable, weather-resistant rubber foam, it provides a reliable base for caulking, enhances insulation, and prevents drafts both indoors and outdoors. Easy to install and trim, this waterproof backer rod is a must-have for professional-grade sealing and energy efficiency.

## Description

Top Solutions for Your Home Visit the Store Top Solutions for Your Home Visit the Store

## 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 |
| Best Sellers Rank | #99,520 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #6 in Rope Caulk #267 in Industrial Sealants #21,396 in Hardware |
| Brand | M-D Building Products |
| Brand Name | M-D Building Products |
| Color | Gray |
| Customer Reviews | 4.6 out of 5 stars 1,642 Reviews |
| Global Trade Identification Number | 00043374714647 |
| Included Components | MD Building - 71464 - 2pk |
| Item Form | Foam |
| Item Type Name | MD Building - 71464 - 2pk |
| Item Weight | 0.6 Ounces |
| Manufacturer | M-D Building Products |
| Material Type | Rubber |
| Model | 71464 |
| Number of Items | 1 |
| Part Number | 71464 |
| Surface Recommendation | surface_recommendation |
| UPC | 043374714647 |
| Unit Count | 1.0 Count |
| Warranty Description | All M-D products are warranted to be free from defects in material and workmanship if installed and used in strict accordance with our installation instructions. |
| Water Resistance Level | Waterproof |

## Product Details

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

## Images

![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 (71464) - Image 1](https://m.media-amazon.com/images/I/61bhNB8Z9UL.jpg)
![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 (71464) - Image 2](https://m.media-amazon.com/images/I/71glyJQDg0L.jpg)
![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 (71464) - Image 3](https://m.media-amazon.com/images/I/818J6gOM3ZL.jpg)
![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 (71464) - Image 4](https://m.media-amazon.com/images/I/81Py1S2524L.jpg)
![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 (71464) - Image 5](https://m.media-amazon.com/images/I/81-xBTntOuL.jpg)

## Available Options

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

## 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 M***N on February 8, 2026*



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



### ⭐⭐⭐⭐⭐ Review
*by J***J on February 23, 2026*



## 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 Indonesia*
*Store origin: ID*
*Last updated: 2026-05-15*