---
product_id: 18312923
title: "Chimney Flashing Sealant"
brand: "chimneyrx"
price: "€ 205.00"
currency: EUR
in_stock: null
reviews_count: 9
category: "Chimneyrx"
url: https://www.desertcart.sk/products/18312923-chimney-flashing-sealant
store_origin: SK
region: Slovakia
---

# Dries in 12 hours Elastomeric waterproof barrier Bonds to multiple roofing surfaces Chimney Flashing Sealant

**Brand:** chimneyrx
**Price:** € 205.00
**Availability:** ❌ Out of Stock

## Summary

> 🛡️ Seal Smart, Stay Dry — The Ultimate Waterproofing Upgrade

## Quick Answers

- **What is this?** Chimney Flashing Sealant by chimneyrx
- **How much does it cost?** € 205.00 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/18312923-chimney-flashing-sealant)

## Best For

- chimneyrx enthusiasts

## Why This Product

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

## Key Features

- • **Seamless Leak Defense:** Creates a flexible, durable shield that stops water intrusion around chimneys, vents, and skylights.
- • **Universal Surface Bonding:** Permanently adheres to asphalt shingles, aluminum flashing, brick, and more for a secure seal.
- • **Flexible Formula, No Cracks:** Unlike tar-based sealants, stays pliable over time to prevent brittleness and leaks.
- • **Fast Dry & Reliable Coverage:** Dries within 12 hours in typical weather, covering up to 14 sq ft per 1/2 gallon for quick, efficient repairs.
- • **Effortless Application & Cleanup:** Brush-on formula applies smoothly and cleans up easily with just soap and water—no fuss, no mess.

## Overview

Black Elastomeric Flashing Sealant by CHIMNEYRX is a professional-grade, brushable waterproof coating designed to protect chimneys, vents, and skylights from leaks. Its elastomeric formula remains flexible to resist cracking, bonds permanently to multiple roofing materials, and dries in just 12 hours, covering approximately 14 square feet per 1/2 gallon. Easy to apply and clean, it’s the go-to solution for long-lasting, hassle-free leak prevention.

## Description

desertcart.com: ChimneyRx 300054 Brushable Chimney Flashing Repair Sealant – Black Elastomeric Waterproof Coating Leak Protection for Chimneys, Vents & Skylights - Bonds to Shingles, Bricks, & More - 1/2 Gallon : Industrial & Scientific

Review: Great Product to Solve/Prevent Leaks Around Chimney Flashing - I really like this product! I like to maintain the flashing around my masonry chimney and I've always done it with a dab of some product here and there, but it is easy to miss an area that might have a gap if it is small. Last year we had an 11" rain here in WI and sure enough, just a small amount of water did leak in around the chimney. With this product you "paint" it over the entire flashing and where it meets the roof and the brick, so there are no missed areas - the entire thing is coated. The product applied quite easily - it's is fairly thick, but it did go on and brush out with a regular paint brush. I followed the instructions and masked the roof and the brick with duct tape and then applied the product. Once done, just remove the tape and you have an amazing looking job! In the on-line instructions the coverage is listed at 14 - 18 sq ft at a thickness of 1/8" for the 1 gallon size. In the desertcart listing it is listed as 12 sq ft, but the product is only 1/2 gallon, so that is not correct. I did 10 sq ft and used about half of the 1/2 gallon container. I would think I must have applied it about 1/16" thick. It is very hard to get an exact thickness when you are applying it.
Review: Easy to use, fair price, seems high quality. - Used this product, as well as both the 1 gallon brushable chimney crown repair and 1 gallon masonry water repellant, on a large ~ 3ft wide, 5 foot long, 4 ft tall chimney built in 1970 that was starting to get some spallimg on the brick work and had leaked in the past and been repaired many years ago. All products went on easy and provided more than enough coverage for the whole chimney with two coats. Haven't noticed any issues even with heavy rain. Will reuse as needed in the future, but expecting it to last a long time. Hoping to use the extra flashing product left over around some skylights. Just follow the instructions and you can't go wrong.

## Features

- ELASTOMERIC WATERPROOF SEALANT: Seals chimney flashing with a durable, flexible barrier; this chimney sealant prevents leaks around chimneys, stacks, vents, and skylights, providing protection against water and harsh weather
- STAYS FLEXIBLE, WON'T CRACK: Unlike tar-based sealants, this chimney repair sealer has an elastomeric formula that stays pliable over time, resisting brittleness and cracking that can cause leaks; it requires no mixing or special bonding agents
- BONDS TO MULTIPLE SURFACES: This waterproofing sealant adheres permanently to asphalt shingles, aluminum flashing, brick, and other roofing materials for a secure, long-lasting seal
- EASY APPLICATION & CLEANUP: Our chimney flashing sealant applies easily with a brush (not included), making repairs quick and simple; cleanup is hassle-free with just soap and water, saving you time and effort
- DRY TIME & COVERAGE: This waterproof coating sealant dries in 12 hours under dry weather conditions, with a temperature range of 45-90°F; each 1/2-gallon plastic container covers approximately 14 square feet

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0060NKMOU |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #110,212 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #135 in Industrial Coatings |
| Brand | CHIMNEYRX |
| Color | Black |
| Customer Reviews | 4.4 4.4 out of 5 stars (284) |
| Date First Available | October 28, 2011 |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid |
| Item Package Quantity | 1 |
| Item Weight | 5.15 pounds |
| Item dimensions L x W x H | 12 x 12 x 12 inches |
| Item model number | BHBUKPPAZINH2401 |
| Manufacturer | SaverSystems |
| Material | Plastic |
| Number Of Pieces | 1 |
| Number of Items | 1 |
| Part Number | 300054 |
| Product Dimensions | 12 x 12 x 12 inches |
| Size | 1/2 Gallon |
| Surface Recommendation | Aluminum Flashing, Asphalt Shingles, Brick |
| UPC | 709057942645 709057941648 |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** CHIMNEYRX
- **Item Form:** Liquid
- **Item dimensions L x W x H:** 12 x 12 x 12 inches
- **Material:** Plastic
- **Water Resistance Level:** Water Resistant

## Images

![Chimney Flashing Sealant - Image 1](https://m.media-amazon.com/images/I/81+13WKLBRL.jpg)
![Chimney Flashing Sealant - Image 2](https://m.media-amazon.com/images/I/71dAEaX5VoL.jpg)
![Chimney Flashing Sealant - Image 3](https://m.media-amazon.com/images/I/71z3FnIeHKL.jpg)
![Chimney Flashing Sealant - Image 4](https://m.media-amazon.com/images/I/71IUh7QJYeL.jpg)
![Chimney Flashing Sealant - Image 5](https://m.media-amazon.com/images/I/71nOuZgw6eL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Product to Solve/Prevent Leaks Around Chimney Flashing
*by T***R on August 17, 2019*

I really like this product! I like to maintain the flashing around my masonry chimney and I've always done it with a dab of some product here and there, but it is easy to miss an area that might have a gap if it is small. Last year we had an 11" rain here in WI and sure enough, just a small amount of water did leak in around the chimney. With this product you "paint" it over the entire flashing and where it meets the roof and the brick, so there are no missed areas - the entire thing is coated. The product applied quite easily - it's is fairly thick, but it did go on and brush out with a regular paint brush. I followed the instructions and masked the roof and the brick with duct tape and then applied the product. Once done, just remove the tape and you have an amazing looking job! In the on-line instructions the coverage is listed at 14 - 18 sq ft at a thickness of 1/8" for the 1 gallon size. In the Amazon listing it is listed as 12 sq ft, but the product is only 1/2 gallon, so that is not correct. I did 10 sq ft and used about half of the 1/2 gallon container. I would think I must have applied it about 1/16" thick. It is very hard to get an exact thickness when you are applying it.

### ⭐⭐⭐⭐⭐ Easy to use, fair price, seems high quality.
*by S***K on September 26, 2018*

Used this product, as well as both the 1 gallon brushable chimney crown repair and 1 gallon masonry water repellant, on a large ~ 3ft wide, 5 foot long, 4 ft tall chimney built in 1970 that was starting to get some spallimg on the brick work and had leaked in the past and been repaired many years ago. All products went on easy and provided more than enough coverage for the whole chimney with two coats. Haven't noticed any issues even with heavy rain. Will reuse as needed in the future, but expecting it to last a long time. Hoping to use the extra flashing product left over around some skylights. Just follow the instructions and you can't go wrong.

### ⭐⭐⭐⭐ Did the job
*by J***A on November 24, 2020*

This arrived on time, and as far as I can tell, it fixed my barn roof. Time will tell. I did not apply this myself, si I’m not sure about things like thickness.

## Frequently Bought Together

- ChimneyRx 300054 Brushable Chimney Flashing Repair Sealant – Black Elastomeric Waterproof Coating Leak Protection for Chimneys, Vents & Skylights - Bonds to Shingles, Bricks, & More - 1/2 Gallon
- ChimneyRx 300014 Brushable Chimney Crown Repair – Elastomeric & Waterproof Coating for Crowns & Masonry - Fast-Setting & Long-Lasting Protection Crack & Leak Prevention - 1 Gallon
- 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 Slovakia*
*Store origin: SK*
*Last updated: 2026-03-02*