---
product_id: 63690755
title: "ChimneySaver FlashSeal Elastomeric Roof Chimney Flashing Sealant - Flexible and Long Lasting Waterproof Sealant to Stop Leaks Around Chimneys, Stacks, Vents & Skylights - 1 Gallon (Black)"
brand: "chimneysaver"
price: "€ 172.51"
currency: EUR
in_stock: true
reviews_count: 10
category: "Chimney Saver"
url: https://www.desertcart.ie/products/63690755-chimneysaver-flashseal-elastomeric-roof-chimney-flashing-sealant-flexible-and-long
store_origin: IE
region: Ireland
---

# 100% waterproof barrier smooth brush-on application 7-year durability warranty ChimneySaver FlashSeal Elastomeric Roof Chimney Flashing Sealant - Flexible and Long Lasting Waterproof Sealant to Stop Leaks Around Chimneys, Stacks, Vents & Skylights - 1 Gallon (Black)

**Brand:** chimneysaver
**Price:** € 172.51
**Availability:** ✅ In Stock

## Summary

> 🛡️ Seal the deal on leaks before the next storm hits!

## Quick Answers

- **What is this?** ChimneySaver FlashSeal Elastomeric Roof Chimney Flashing Sealant - Flexible and Long Lasting Waterproof Sealant to Stop Leaks Around Chimneys, Stacks, Vents & Skylights - 1 Gallon (Black) by chimneysaver
- **How much does it cost?** € 172.51 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/63690755-chimneysaver-flashseal-elastomeric-roof-chimney-flashing-sealant-flexible-and-long)

## Best For

- chimneysaver enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Synthetic rubber formula stays flexible for years—no cracking, chipping, or brittleness.
- • **Leakproof Confidence:** Stops water leaks at chimneys, vents & skylights with a flexible, waterproof seal.
- • **Seamless Integration:** Bonds permanently to asphalt shingles, metal, brick & more in black, brown, or tintable white.
- • **Effortless Application:** Brush on easily with smooth coverage; cleans up with just soap and water.
- • **Warranty-Backed Peace of Mind:** 7-year warranty when paired with FlashSeal Fabric ensures long-term protection.

## Overview

ChimneySaver FlashSeal is a premium elastomeric roof flashing sealant designed to create a flexible, waterproof membrane around chimneys, vents, stacks, and skylights. Its synthetic rubber base ensures long-lasting flexibility without cracking or hardening, providing a durable barrier that bonds permanently to multiple roofing materials. Easy to apply with a brush and backed by a 7-year warranty (with reinforcement fabric), it’s the professional-grade solution for preventing leaks and protecting your roof investment.

## Description

FlashSeal is a versatile and easy-to-use flashing repair system that, when dry, forms a flexible, waterproof membrane. It’s formulated for permanent adhesion to asphalt shingles, metal flashings, brick, and other chimney and roofing materials. Use FlashSeal to solve problem leaks around the base of chimneys, stacks, and vents. It is also great for sealing around skylights. Repairing flashings that have been tarred over, split, cracked, or are in disrepair is easy with FlashSeal. It’s like installing a custom-fit rubber boot at the base of the chimney! It remains permanently flexible and has a 7 year warranty when used with FlashSeal Reinforcement Fabric.

Review: Works like a charm! - I ordered this product to repair a nagging chimney leak that I could not seem to remedy with roofing caulk. After the 3rd failure to fix the leak I ordered the Chimney Saver. After the first rain I didn’t encounter a single leak. Although time will tell the whole story I am so far impressed with this product. It was easy enough to apply and very easy to clean up. I bought the Flash Seal reinforcement mesh that is recommended with this product which also helped to create a nice thick layer around the bottom of the chimney. I used duct tape to make a clean application line around the base which worked like a champ. I had some left over so I sealed the top part of the chimney where the mortar was starting to crack. This stuff is a little pricey but it does the job. Saving the expense of calling a roofer was well worth it. Update: The Dallas area that I live in just got hit with a terrible storm that produced extremely high winds and copious amounts of rain. I am happy to report that the repair job on my chimney held up beautifully. Not one drop of water made it through. I now have to say that this product is battle tested, tried and true. This storm was one of the worst that I can remember in several decades so I would gladly tack on some more stars if I could.
Review: Excellent product for repairing existing chimney flashing, very happy! - Excellent sealant specifically formulated for chimney flashing repair. I had a small seeping leak of rain drops going along the chimney inside the attic. Wasn't a big deal, but I didn't want to take any chances. I highly recommend this to mend your chimney flashing woes rather than spending thousands on roofing experts. For less than $100 you can do it yourself and be proud of a great job! The application is easy with a standard wide 3" paint brush and goes on like frosting on a cake. Rather easy to use and seals nicely. I highly recommend using the reinforcement fabric to make your seal nice and tight. I was going to go the cheap route and buy some standard drywall seam tape, but it wasn't wide enough for my application. I bought the brown color because my roof is tan/brown and it blends right in like camouflage perfectly! I'm glad to have found this product here, as it can't be purchased anywhere at local big box hardware stores. I'm waiting to see it dry and test it with the next large rain storm to see if it works. This product could also be used around roof vent-pipes or around skylights from what I read.

## Features

- STOPS WATER LEAKS: Ideal for chimney flashing repair, FlashSeal creates a flexible waterproof barrier to stop leaks where chimneys meet the roofline; also works great for sealing around vents, stacks, and skylights
- LONG-LASTING FLEXIBILITY: Made from durable synthetic rubber, this roof chimney sealant won’t crack, chip, or become brittle; it stays flexible over time, ensuring reliable protection without hardening or losing its effectiveness
- EASY TO APPLY ELASTOMERIC SEALANT: This flashing chimney sealer applies smoothly with a brush (not included); apply about 1/8” of coating to the surface, making sure to fill all cracks and holes; cleans up easily with soap and water
- STRONG ADHESION: This chimney waterproofing sealant is designed for permanent bonding to asphalt shingles, metal flashing, brick, and other roofing materials; available in black, brown, and tintable white to match or complement your surface color
- CHIMNEY REPAIR PRODUCTS WITH 7-YEAR WARRANTY: Backed by a 7-year warranty when used with FlashSeal Fabric (sold separately), this chimney roof flashing sealant provides long-lasting protection and peace of mind for chimney flashing repairs

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0186ME0UE |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #384,047 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #882 in Hardware Sealers |
| Brand | ChimneySaver |
| Color | Black |
| Customer Reviews | 4.6 4.6 out of 5 stars (268) |
| Date First Available | April 26, 2010 |
| EU Spare Part Availability Duration | 7 Years |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid |
| Item Package Quantity | 1 |
| Item Weight | 14 pounds |
| Item dimensions L x W x H | 9 x 9 x 9 inches |
| Item model number | 24636 |
| Manufacturer | SaverSystems |
| Material | Synthetic Rubber |
| Number Of Pieces | 1 |
| Number of Items | 1 |
| Part Number | 300049 |
| Product Dimensions | 9 x 9 x 9 inches |
| Size | 1 Gallon |
| Style | Custom |
| Surface Recommendation | Fabric |
| UPC | 709057740012 784497141964 |
| Unit Count | 128.0 Fluid Ounces |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** ChimneySaver
- **Item Weight:** 14 Pounds
- **Item dimensions L x W x H:** 9 x 9 x 9 inches
- **Material:** Synthetic Rubber
- **Style:** Custom

## Images

![ChimneySaver FlashSeal Elastomeric Roof Chimney Flashing Sealant - Flexible and Long Lasting Waterproof Sealant to Stop Leaks Around Chimneys, Stacks, Vents & Skylights - 1 Gallon (Black) - Image 1](https://m.media-amazon.com/images/I/31kK7sHqvEL.jpg)
![ChimneySaver FlashSeal Elastomeric Roof Chimney Flashing Sealant - Flexible and Long Lasting Waterproof Sealant to Stop Leaks Around Chimneys, Stacks, Vents & Skylights - 1 Gallon (Black) - Image 2](https://m.media-amazon.com/images/I/41PnsT+YnBL.jpg)
![ChimneySaver FlashSeal Elastomeric Roof Chimney Flashing Sealant - Flexible and Long Lasting Waterproof Sealant to Stop Leaks Around Chimneys, Stacks, Vents & Skylights - 1 Gallon (Black) - Image 3](https://m.media-amazon.com/images/I/51-2erywkcL.jpg)
![ChimneySaver FlashSeal Elastomeric Roof Chimney Flashing Sealant - Flexible and Long Lasting Waterproof Sealant to Stop Leaks Around Chimneys, Stacks, Vents & Skylights - 1 Gallon (Black) - Image 4](https://m.media-amazon.com/images/I/51NN54aKW+L.jpg)
![ChimneySaver FlashSeal Elastomeric Roof Chimney Flashing Sealant - Flexible and Long Lasting Waterproof Sealant to Stop Leaks Around Chimneys, Stacks, Vents & Skylights - 1 Gallon (Black) - Image 5](https://m.media-amazon.com/images/I/51iKX00zLFL.jpg)

## Available Options

This product comes in different **Color** options.

## Questions & Answers

**Q: does cloth come with the sealant?**
A: Negative. As of 12/5/2016, there isn't a 'with cloth' option.

**Q: Does the finished seal need to be coated to provide uv protection and extend the life?  if so, what coatings are acceptable?**
A: No, not to my knowledge. My metal flashing rusted out and I had a temporary patch with some other product (applied like caulking), but that failed in a year. Then I tried this product because I knew it was going to be temporary also because my roof was going to be replaced eventually. So, the reinforcement fabric is a must and follow the directions carefully. It held for 4 years until I eventually replaced my roof. I did not apply any sealant or UV protection product over it.

**Q: Has anyone used this around the flashing of a skylight?**
A: No, but if you use the correct detail around the skylight curb, I do not see why it would not work.

**Q: Where can I get a copy of the Material Safety Data Sheet on Flash Seal?**
A: http://chimneysaver.com/product-datasheets/https://saversystems.s3.amazonaws.com/product-data/chimneysaver-flash-seal-sds.pdf

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works like a charm!
*by M***N on June 8, 2019*

I ordered this product to repair a nagging chimney leak that I could not seem to remedy with roofing caulk. After the 3rd failure to fix the leak I ordered the Chimney Saver. After the first rain I didn’t encounter a single leak. Although time will tell the whole story I am so far impressed with this product. It was easy enough to apply and very easy to clean up. I bought the Flash Seal reinforcement mesh that is recommended with this product which also helped to create a nice thick layer around the bottom of the chimney. I used duct tape to make a clean application line around the base which worked like a champ. I had some left over so I sealed the top part of the chimney where the mortar was starting to crack. This stuff is a little pricey but it does the job. Saving the expense of calling a roofer was well worth it. Update: The Dallas area that I live in just got hit with a terrible storm that produced extremely high winds and copious amounts of rain. I am happy to report that the repair job on my chimney held up beautifully. Not one drop of water made it through. I now have to say that this product is battle tested, tried and true. This storm was one of the worst that I can remember in several decades so I would gladly tack on some more stars if I could.

### ⭐⭐⭐⭐⭐ Excellent product for repairing existing chimney flashing, very happy!
*by A***M on July 30, 2017*

Excellent sealant specifically formulated for chimney flashing repair. I had a small seeping leak of rain drops going along the chimney inside the attic. Wasn't a big deal, but I didn't want to take any chances. I highly recommend this to mend your chimney flashing woes rather than spending thousands on roofing experts. For less than $100 you can do it yourself and be proud of a great job! The application is easy with a standard wide 3" paint brush and goes on like frosting on a cake. Rather easy to use and seals nicely. I highly recommend using the reinforcement fabric to make your seal nice and tight. I was going to go the cheap route and buy some standard drywall seam tape, but it wasn't wide enough for my application. I bought the brown color because my roof is tan/brown and it blends right in like camouflage perfectly! I'm glad to have found this product here, as it can't be purchased anywhere at local big box hardware stores. I'm waiting to see it dry and test it with the next large rain storm to see if it works. This product could also be used around roof vent-pipes or around skylights from what I read.

### ⭐⭐⭐⭐⭐ EZ to apply, does what it says.
*by K***G on June 12, 2023*

We had three leaks where our chimney met the roof line. Applied as directed and all three cracks/leaks are sealed. Using the fiberglass mesh tape is the way to go. Really makes the product stronger and I think will last for years. Oh yes, working from top to bottom helps seal everything and it bonded to both flashing and the brick.

## Frequently Bought Together

- FlashSeal Elastomeric Flashing Sealant, 1 Gallon (Black)
- FlashSeal Reinforcement Fabric, 1 roll 6"  x 150 ft
- ChimneyRx 300119 Masonry Chimney Water Repellent - Siloxane Based, Non-Film-Forming, Breathable, and Transparent Waterproof Coating for Brick Chimneys & Other Vertical Surfaces - 1 Gallon

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-07*