---
product_id: 635158628
title: "Black Backer Rod, Rubber Caulk Saver Concrete Filler Rope Weather Stripping for Gaps and Joints (Diametre 1/4in x Length 16.4ft)"
brand: "coengwui"
price: "70 Lei"
currency: RON
in_stock: true
reviews_count: 8
url: https://www.desertcart.ro/products/635158628-black-backer-rod-rubber-caulk-saver-concrete-filler-rope-weather
store_origin: RO
region: Romania
---

# 16.4ft Length 1/4in Diameter EPDM Material Black Backer Rod, Rubber Caulk Saver Concrete Filler Rope Weather Stripping for Gaps and Joints (Diametre 1/4in x Length 16.4ft)

**Brand:** coengwui
**Price:** 70 Lei
**Availability:** ✅ In Stock

## Summary

> Seal the Deal! 🛠️

## Quick Answers

- **What is this?** Black Backer Rod, Rubber Caulk Saver Concrete Filler Rope Weather Stripping for Gaps and Joints (Diametre 1/4in x Length 16.4ft) by coengwui
- **How much does it cost?** 70 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/635158628-black-backer-rod-rubber-caulk-saver-concrete-filler-rope-weather)

## Best For

- coengwui enthusiasts

## Why This Product

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

## Key Features

- • **Timeless Design:** Sleek black color resists dirt and blends seamlessly.
- • **Reliable Material:** Durable EPDM ensures flexibility and temperature resistance.
- • **Superior Durability:** Exceptional wear and corrosion resistance for long-lasting use.
- • **Effortless Application:** Simply insert and cut for a seamless finish.
- • **Versatile Crack Solution:** Perfect for sealing various cracks and joints.

## Overview

The Black Backer Rod is a 1/4 inch diameter, 16.4-foot long rubber caulk saver designed for effortless application in sealing gaps and joints. Made from durable EPDM material, it offers excellent flexibility, temperature resistance, and superior wear and corrosion resistance, making it ideal for a variety of applications including pavements, walls, and automotive uses.

## Description

Full description not available

## Features

- Effortless Application: Simply insert our rubber strip into the desired space, press it firmly, and cut if needed. Then cover and smooth it with caulk for a seamless and professional finish. Achieve a flawless result with minimal effort.
- Versatile Crack Solution: Our rubber strip is the perfect solution for a variety of cracks, including pavement, wall joints, and foundations. It provides a smooth surface for easy caulking projects. The timeless black color stays clean and resistant to dirt. Simplify crack sealing with our versatile rubber strip
- Versatile Applications: Our product finds extensive use in different settings. Seal side seams of sliding doors, glass doors, windows, wardrobes, and closets. It is equally suitable for sealing doors, windows, and hatches in automobiles, ships, and other applications. Experience its adaptability and effectiveness, providing a reliable and secure seal that keeps out drafts, noise, and dust.
- Reliable Material: Crafted from durable EPDM, our backer rod ensures excellent flexibility, temperature resistance, corrosion resistance, and wear resistance. It provides reliable sound insulation, heat insulation, and maintains its shape under pressure.
- Superior Wear and Corrosion Resistance: It possesses exceptional wear resistance and corrosion resistance, allowing for extended use and the ability to adapt to a variety of harsh conditions.

## Product Details

- **Brand:** Coengwui
- **Material:** L: 16.4ft x D: 1/4in
- **Color:** Matte Black
- **Product Dimensions:** 0.25"W
- **Item Thickness:** 0.25 Inches

## Images

![Black Backer Rod, Rubber Caulk Saver Concrete Filler Rope Weather Stripping for Gaps and Joints (Diametre 1/4in x Length 16.4ft) - Image 1](https://m.media-amazon.com/images/I/710TkYzkxCL.jpg)
![Black Backer Rod, Rubber Caulk Saver Concrete Filler Rope Weather Stripping for Gaps and Joints (Diametre 1/4in x Length 16.4ft) - Image 2](https://m.media-amazon.com/images/I/81AspzU848L.jpg)
![Black Backer Rod, Rubber Caulk Saver Concrete Filler Rope Weather Stripping for Gaps and Joints (Diametre 1/4in x Length 16.4ft) - Image 3](https://m.media-amazon.com/images/I/812sDO8ZfoL.jpg)
![Black Backer Rod, Rubber Caulk Saver Concrete Filler Rope Weather Stripping for Gaps and Joints (Diametre 1/4in x Length 16.4ft) - Image 4](https://m.media-amazon.com/images/I/61fq1u83K2L.jpg)
![Black Backer Rod, Rubber Caulk Saver Concrete Filler Rope Weather Stripping for Gaps and Joints (Diametre 1/4in x Length 16.4ft) - Image 5](https://m.media-amazon.com/images/I/71Ki3OtqoBL.jpg)

## Available Options

This product comes in different **Material Type** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Trying to save energy. PG&E rates too high.
*by A***R on June 19, 2025*

I used it to seal the gap in the partially open window with a window air conditioner, the window slides horizontally. The gap is between the sliding window and the fixed window. Works good, just the right thickness.

### ⭐⭐⭐⭐ Glue it down first to hold it in, down and straight
*by G***E on July 17, 2024*

The idea is to use this instead of expensive caulk to fill concrete cracks. It is a reasonable idea, but there are some caveats. I should have studied up on YouTube or something, because I ran into trouble right away.These sort of products need to be held mechanically in place by being wedged in. I didn't have that circumstance in the particular spot I chose to use this, rather it was a wide V groove expansion joint I wanted to cover over - the "rod" just lay in the bottom of the groove. So two problems with that: 1) The product was delivered in a loose bundle, which it remembers the turns, so it can't be pulled actually straight - it waves up and down every so often. (I'd thought, as I was fighting with it, that I should have strung it up in the sun outside for a couple of days - tight like a clothesline). 2) This product is denser than the LowDepot variety (which is larger diameter), but it is still lighter than the caulk. Thus, if it isn't wedged in, just lying in the V, it wants to float up.The better way for dealing with a V, if you are using this type of product, is to prep it by sticking it down with fast setting Construction Adhesive on the ends at least, with a bit more here and there as needed. Pull it tight, and weigh it down. Let that set up for an hour or few, then go in with the concrete patch goo.If you are cheap and have lots of time, there are alternatives to this product. In one area, I got frustrated and used some coarse sand and made a goo aggregate. This doesn't float and sets up into a really hard fill, not squishy. It was sort of suggested by the caulk vendor - they said to fill cracks with sand if it is more than a certain depth. In my case I already had goo in the crack, so I couldn't put sand under it; I had to mix it. That works really well, however, it is very time consuming and hard to control and contain. I also experimented with using a fresh razor sharp utility knife to slice long V segments from a pool noodle. This also worked (no coil curl and allowed fitment for crack variation), but it was lots more time invested, similarly prone to floating if not wedged, and did set up rather squishy.Bottom line: The product is what it says it is and will deliver good results if used within its limitations. However, unless you read this or look online elsewhere, you'll not be helped by any product instructions as there were none.

### ⭐⭐⭐⭐⭐ As advertised, with many applications .
*by T***D on April 26, 2025*

Used to seal a seam in the bottom metal fireplace frame that was causing cold air to leak into the house during winter. Was the perfect solution.

## Frequently Bought Together

- Coengwui Black Backer Rod, Rubber Caulk Saver Concrete Filler Rope Weather Stripping for Gaps and Joints (Diametre 1/4in x Length 16.4ft)
- 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)
- 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)

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-11*