---
product_id: 179540496
title: "1\" Closed Cell Backer Rod/Crack Filler (25 ft)"
brand: "armacell"
price: "3178 kr"
currency: ISK
in_stock: true
url: https://www.desertcart.is/products/179540496-1-closed-cell-backer-rod-crack-filler-25-ft
store_origin: IS
region: Iceland
---

# Waterproof rubber foam 1.13" max gap fill 25 ft continuous length 1" Closed Cell Backer Rod/Crack Filler (25 ft)

**Brand:** armacell
**Price:** 3178 kr
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal smart, save time — the pro’s secret weapon!

## Quick Answers

- **What is this?** 1" Closed Cell Backer Rod/Crack Filler (25 ft) by armacell
- **How much does it cost?** 3178 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/179540496-1-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

- • **Caulk Protector:** Prevents caulk from ripping loose, extending sealant life
- • **Pro-Length Roll:** Generous 25-foot length for multiple projects without interruption
- • **Perfect Gap Filler:** Seamlessly fills gaps from 3/4" to 1-1/8" for flawless sealing
- • **Versatile Application:** Ideal for floors and radon pipe entries, ensuring professional-grade results
- • **Durable Waterproof Foam:** Rubber-based closed cell foam resists moisture and wear

## Overview

Armacell’s 1" Closed Cell Backer Rod is a durable, waterproof rubber foam designed to fill large gaps up to 1.13 inches. Sold in a convenient 25-foot roll, it supports caulk application by preventing tearing and ensuring long-lasting seals, perfect for floors and radon pipe installations.

## Description

1" Closed Cell Backer Rod/Crack Filler (25 ft)

## Features

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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Color | Grey |
| Brand | Armacell |
| Item Form | Foam |
| Maximum Gap Fill | 1.13 Inches |
| Surface Recommendation | Floor |
| Water Resistance Level | Waterproof |
| Number of Items | 1 |
| Manufacturer | armacell |
| UPC | 301635340128 |
| Unit Count | 25 Feet |
| Material | Rubber |
| Part Number | yyhg-905 |
| Item Weight | 4.8 ounces |

## Product Details

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

## Images

![1" Closed Cell Backer Rod/Crack Filler (25 ft) - Image 1](https://m.media-amazon.com/images/I/41wpFNfbCWL.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.is/products/179540496-1-closed-cell-backer-rod-crack-filler-25-ft](https://www.desertcart.is/products/179540496-1-closed-cell-backer-rod-crack-filler-25-ft)

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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-02-02*