---
product_id: 179540496
title: "Armacell 1\" Closed Cell Backer Rod/Crack Filler (25 ft)"
brand: "armacell"
price: "462.13 DT"
currency: TND
in_stock: true
category: "Armacell"
url: https://www.desertcart.tn/products/179540496-armacell-1-closed-cell-backer-rod-crack-filler-25-ft
store_origin: TN
region: Tunisia
---

# Waterproof foam for lasting seal 1" diameter for perfect gap fill 25 ft length for extensive projects Armacell 1" Closed Cell Backer Rod/Crack Filler (25 ft)

**Brand:** armacell
**Price:** 462.13 DT
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal smarter, not harder — fill gaps like a pro!

## Quick Answers

- **What is this?** Armacell 1" Closed Cell Backer Rod/Crack Filler (25 ft) by armacell
- **How much does it cost?** 462.13 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/179540496-armacell-1-closed-cell-backer-rod-crack-filler-25-ft)

## Best For

- armacell enthusiasts

## Why This Product

- Trusted armacell brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Extend Your Reach:** Generous 25-foot length lets you tackle multiple projects without constant reordering.
- • **Durable Waterproof Foam:** Closed-cell rubber foam resists moisture, preventing caulk failure and maintaining integrity.
- • **Trusted by Pros & DIYers:** Highly rated with 4.7 stars from over 1,400 users—join the community sealing smarter.
- • **Perfect Fit for Large Gaps:** Designed to fill cracks from 3/4" to 1-1/8" wide, ensuring a seamless seal every time.
- • **Protect Your Caulk Investment:** Backer rod supports caulk, stopping it from ripping loose and extending sealant life.

## Overview

Armacell's 1" Closed Cell Backer Rod is a 25-foot waterproof foam rod designed to fill large cracks between 3/4" and 1-1/8" wide. It supports caulk application by preventing ripping and extending sealant durability, making it a must-have for professional-grade sealing on floors and other surfaces.

## Description

Backer rod is important when sealing large gaps. It allows caulk to span a gap without ripping loose. In the example above backer rod is used where the radon pipe enters the floor before caulk is applied. 1" backer rod is perfect for filling gaps 3/4" to 1-1/8" wide. Sold in 25 foot lengths.

## Features

- Fill large cracks
- Save caulk
- Keep caulk from ripping loose
- Fill large s

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B081NTJ51G |
| Best Sellers Rank | #67,093 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #238 in Hardware Sealers |
| Brand Name | Armacell |
| Color | Grey |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,415) |
| Item Form | Foam |
| Manufacturer | armacell |
| Material Type | Rubber |
| Maximum Gap Fill | 1.13 inches |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | yyhg-905 |
| Surface Recommendation | Floor |
| UPC | 301635340128 |
| Unit Count | 25 Feet |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Armacell
- **Color:** Grey
- **Item Form:** Foam
- **Maximum Gap Fill:** 1.13 inches
- **Surface Recommendation:** Floor

## Images

![Armacell 1" Closed Cell Backer Rod/Crack Filler (25 ft) - Image 1](https://m.media-amazon.com/images/I/41wpFNfbCWL.jpg)
![Armacell 1" Closed Cell Backer Rod/Crack Filler (25 ft) - Image 2](https://m.media-amazon.com/images/I/41-MiFwoBcL.jpg)

## Questions & Answers

**Q: Pulled out my rotted 1x4 expansion wood and will have 1-2" void under backer rod when installed.  Any requirement to put something like sand under it?**
A: i think sand would work. Maybe backer rod under backer rod ?

**Q: Can this rod be easily compressed to fit into narrow spaces?**
A: Yes, it is foam and can be compressed by more than half, it can also be trimmed with scissors if needed.

**Q: Can this be used as concrete joint filler?**
A: Yes this works well to fill a gap in concrete, but it should be topped off a good caulk approved for use with cement.

**Q: it is stiff enough to force into the void in the garage door bottom seal?  I just replaced the seal and was looking for something to help keep shape**
A: I actually have some of this 1" backer rod slipped into the seal on my door to fix a section that separated. But it might be kind of difficult to pull into many feet of seal.

## Frequently Bought Together

- Armacell 1" Closed Cell Backer Rod/Crack Filler (25 ft)
- 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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**Shop now:** [https://www.desertcart.tn/products/179540496-armacell-1-closed-cell-backer-rod-crack-filler-25-ft](https://www.desertcart.tn/products/179540496-armacell-1-closed-cell-backer-rod-crack-filler-25-ft)

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-08-27*