---
product_id: 4930967
title: "EB-RB040-50R Roof Seal, Black, 4 Inch X 50 Feet"
brand: "eternabond"
price: "448.31 DT"
currency: TND
in_stock: true
reviews_count: 13
category: "Eterna Bond"
url: https://www.desertcart.tn/products/4930967-eb-rb040-50r-roof-seal-black-4-inch-x-50
store_origin: TN
region: Tunisia
---

# UV stable for years in full sunlight Works down to -20°F with EternaPrime 700%+ elongation for ultimate flexibility EB-RB040-50R Roof Seal, Black, 4 Inch X 50 Feet

**Brand:** eternabond
**Price:** 448.31 DT
**Availability:** ✅ In Stock

## Summary

> 🛡️ Seal it once, forget leaks forever!

## Quick Answers

- **What is this?** EB-RB040-50R Roof Seal, Black, 4 Inch X 50 Feet by eternabond
- **How much does it cost?** 448.31 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/4930967-eb-rb040-50r-roof-seal-black-4-inch-x-50)

## Best For

- eternabond enthusiasts

## Why This Product

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

## Key Features

- • **Unmatched Flexibility:** Elongation over 700% ensures the seal moves with your roof, preventing cracks and leaks.
- • **All-Weather Performance:** Effective application down to -20°F means no seasonal delays in your repairs.
- • **Permanent Leak Protection:** Creates a water-tight, UV-resistant seal that lasts through harsh sun and rain.
- • **Universal Roof Compatibility:** Bonds seamlessly to EPDM, metal, RV roofs, and even submerged surfaces.
- • **Professional-Grade Reliability:** Trusted by roof specialists and DIYers alike for pools, gutters, and more.

## Overview

EternaBond EB-RB040-50R Roof Seal is a professional-grade, black sealing tape designed for all roof types and beyond. With over 700% elongation, UV stability, and the ability to bond underwater or in freezing temperatures, it delivers a permanent, flexible, and water-tight seal trusted by experts and homeowners alike.

## Description

Roof Seal is the best solution for leak repair. The choice of professional roof repair specialists, on virtually all roof types and even works great on land-fill and pond liners. Our specialized backing has proven to be UV stable, even after years in full sunlight. Micro Sealant has a built in primer which allows Roof Seal to bond with the surface it is installed on. Perfect for reseaming all roofs, regardless of the material. Roof Seal makes a permanent water-tight seal. Elongation factor greater than 700% guarantees Roof Seal will flex, expand and contract in all conditions. Can be installed to -20 degrees F (with our EternaPrime). Sag rating of over 250 degrees F. Also great for tank repairs.

Review: Saved the day! - This really saved the day in my fish pond. I have a big oak tree in my back yard and a limb fell into the pond and punctured a hole that you could put your fist through. The pond holds 1450 gallons of water and is 36" deep and only about 8"-12" of water remained. There are Koi in it two feet in length and have been it the pond since 1996. I ordered this through desertcart off this dealer, and added extra cost to ship ASAP. They did just that and arrived when it was supposed to. (THANKS)I followed all the directions to the T and knock on wood it's holding like there was never a hole in it. This is a great product and it will seal against itself as the hole was in a (V) shape and I applied the patch one way and then in the opposite way. P.S. I didn't loose any fish during this four day ordeal as it happened late on Friday tape ordered Saturday, tape arrived Monday, cure time on tape was 24 hours, and started filling it back up on Tuesday.
Review: Amazing - I purchased this tape for my A-frame bubble windows that were leaking. I have to be honest I didn’t even scrape off the old sealant. I put this on and used a small hand roller. I’ve used my camper for the last two seasons and have not had one leak. I did use adapt caulking around the inside of the windows as well. This tape was very easy to use. I am a single woman and had no problems fixing my window leaks using this tape.

## Features

- Sticks to all types of roofs: EPDM, metal roofs, roof flashings, RV roofs
- Stops leaks in pools, gutters, showers, PVC pipes, buried pipes
- UV Stable
- Can even be applied to surfaces submerged underwater
- Can be applied in temps down to -20 degrees F

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B002RRKW4I |
| Best Sellers Rank | #161,318 in Automotive ( See Top 100 in Automotive ) #115 in RV Sealants |
| Brand | EternaBond |
| Customer Reviews | 4.6 4.6 out of 5 stars (290) |
| Date First Available | October 5, 2009 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.64 ounces |
| Item model number | EB-RB040-50R |
| Manufacturer | EternaBond |
| Manufacturer Part Number | EB-RB040-50R |
| Model | EB-RB040-50R |
| OEM Part Number | RSB-4-50 |

## Images

![EB-RB040-50R Roof Seal, Black, 4 Inch X 50 Feet - Image 1](https://m.media-amazon.com/images/I/81UfeW5iIcL.jpg)

## Questions & Answers

**Q: Can this be used underwater like on a pond liner**
A: I would look for a better solution. I used this tape on my rubber membrane roof and in 2 years rainwater had dissolved the adhesive creating pockets under the tape. If there are fish in your pond, the adhesive may be detrimental to their health.

**Q: the tape is not properly bonding. It’s pliable and moving around like the adhesive is not set. has been installed since we bought.**
A: You really need to weather the surface first.  We waited a year.  You must apply in very warm conditions for the tape to adhere correctly.

**Q: What is the color?**
A: Black, however, it also comes in white.

**Q: Can this be used in place of duct tape on surfaces other than roof?  Will it last longer longer than duct tape when exposed to harsh sun and freezing?**
A: it will last longer than duct tape for sure.  make sure where you apply it, it is clean and press it on real good

## Customer Reviews

### ⭐⭐⭐⭐⭐ Saved the day!
*by K***M on November 5, 2011*

This really saved the day in my fish pond. I have a big oak tree in my back yard and a limb fell into the pond and punctured a hole that you could put your fist through. The pond holds 1450 gallons of water and is 36" deep and only about 8"-12" of water remained. There are Koi in it two feet in length and have been it the pond since 1996. I ordered this through Amazon off this dealer, and added extra cost to ship ASAP. They did just that and arrived when it was supposed to. (THANKS)I followed all the directions to the T and knock on wood it's holding like there was never a hole in it. This is a great product and it will seal against itself as the hole was in a (V) shape and I applied the patch one way and then in the opposite way. P.S. I didn't loose any fish during this four day ordeal as it happened late on Friday tape ordered Saturday, tape arrived Monday, cure time on tape was 24 hours, and started filling it back up on Tuesday.

### ⭐⭐⭐⭐⭐ Amazing
*by K***T on January 4, 2025*

I purchased this tape for my A-frame bubble windows that were leaking. I have to be honest I didn’t even scrape off the old sealant. I put this on and used a small hand roller. I’ve used my camper for the last two seasons and have not had one leak. I did use adapt caulking around the inside of the windows as well. This tape was very easy to use. I am a single woman and had no problems fixing my window leaks using this tape.

### ⭐⭐⭐⭐⭐ Super sticky, seals great
*by I***0 on December 26, 2025*

Great stuff, kinda hard to use since it's so sticky, hard cut clean.

## Frequently Bought Together

- EternaBond EB-RB040-50R Roof Seal, Black, 4 Inch X 50 Feet
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- EternaBond EternaPrime Adhesive and Surface Conditioner Spray - 14oz Can | EB-EPSPC | Aids in Adhesion on Dirty or Dusty Surfaces - For MicroSealant and Other Self Adhesive Seaming Tape

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-01-23*