---
product_id: 18312922
title: "ChimneyRx 300014 Brushable Chimney Crown Repair – Elastomeric & Waterproof Coating for Crowns & Masonry - Fast-Setting & Long-Lasting Protection Crack & Leak Prevention - 2 Gallon"
brand: "chimneyrx"
price: "1612.81 DT"
currency: TND
in_stock: true
reviews_count: 8
category: "Chimneyrx"
url: https://www.desertcart.tn/products/18312922-chimneyrx-300014-brushable-chimney-crown-repair-elastomeric-and-waterproof-coating
store_origin: TN
region: Tunisia
---

# Elastomeric waterproof membrane Fast 2-4 hour cure time Brush-on, no primer needed ChimneyRx 300014 Brushable Chimney Crown Repair – Elastomeric & Waterproof Coating for Crowns & Masonry - Fast-Setting & Long-Lasting Protection Crack & Leak Prevention - 2 Gallon

**Brand:** chimneyrx
**Price:** 1612.81 DT
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal the deal with ChimneyRx—where fast meets fortress-level protection!

## Quick Answers

- **What is this?** ChimneyRx 300014 Brushable Chimney Crown Repair – Elastomeric & Waterproof Coating for Crowns & Masonry - Fast-Setting & Long-Lasting Protection Crack & Leak Prevention - 2 Gallon by chimneyrx
- **How much does it cost?** 1612.81 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/18312922-chimneyrx-300014-brushable-chimney-crown-repair-elastomeric-and-waterproof-coating)

## 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

- • **Quick-Cure Efficiency:** Fast-setting formula cures in just 2-4 hours, minimizing downtime and weather exposure risks.
- • **Effortless Application:** Brush-on design requires no primer or mixing—perfect for busy pros and DIYers seeking seamless results.
- • **Durable Waterproof Shield:** Creates a flexible, crack-resistant barrier that protects chimney crowns from water damage and deterioration.
- • **Long-Lasting Leak Prevention:** Seals small cracks up to ¼ inch, preventing leaks and extending the life of your masonry surfaces.
- • **Versatile Masonry Protection:** Ideal for chimney crowns, corbels, parapets, and masonry sills, with tinting options for a flawless finish.

## Overview

ChimneyRx 300014 is a 2-gallon elastomeric, waterproof coating designed for chimney crowns and masonry surfaces. It forms a durable, flexible membrane that prevents cracks and leaks, cures quickly within 2-4 hours, and applies easily with a brush—no primer or mixing required. Covering approximately 40 sq ft per gallon, it offers long-lasting protection against water intrusion and deterioration, making it a must-have for maintaining and restoring chimney integrity.

## Description

Buy ChimneyRx 300014 Brushable Chimney Crown Repair – Elastomeric & Waterproof Coating for Crowns & Masonry - Fast-Setting & Long-Lasting Protection Crack & Leak Prevention - 2 Gallon | Waterproof Elastomeric Masonry Coating, Fast-setting, Long-lasting Protection for Crack and Leak Prevention.: Paint, Wall Treatments & Supplies - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Easy application, solid product. - Easy application. Cures quickly and makes a solid continuous seal along the cap. First coat paints on like paint to ensure all cracks and crevices are filled. Short time later it tacks up to allow for a heavier finish coat. I actually put 3 coats on my chimney cap and still had product left over. If it holds up well this would be a very recommended product.
Review: Superb Product... - This product worked to perfection! The crown of our chimney was severely damaged by a earthquake three years ago and I didn't think to check the chimney for damage...until two months ago when the rains began pouring into the fireplace. After a thorough inspection and online research I decided on CHIMNEYRX...and it was fabulous. Online purchase was easy...delivery on time...instructions clear and concise...and VERY helpful. Very easy to apply and when completed...looked like a pro. Things I did that might be helpful to others...dip your brush in water and shake excess water before applying material...makes for much smoother application and fewer brush strokes. If product begins to dry upon application...it was nearly 90 degrees and dry when I applied...spray your brush with water spritzer used to moisten chimney crown before applying product...again...makes for superior application with minimal brush strokes. Cleanup was very easy and materials are adhering like a fortress. Haven't had heavy rains to test it thoroughly, but I have NO doubt this product will be the answer to all my problems. To ensure a waterproof chimney, I also sprayed a masonry sealant on the bricks...easy to do and should last for years.

## Features

- ELASTOMERIC WATERPROOF SEALANT: Creates a durable, flexible waterproof membrane that seals and protects chimney crowns from water intrusion; this chimney sealant prevents leaks, cracking, and deterioration, ensuring long-lasting protection
- FLEXIBLE CHIMNEY REPAIR SEALER: Perfect for sealing small cracks and surface flaws in chimney crowns; this long-lasting, flexible sealer won’t crack or chip over time and requires no mixing or special bonding agents; not for gaps or cracks over ¼”
- VERSATILE & EASY TO APPLY: Ideal for chimney crowns, corbels, parapets, and masonry sills; no primer needed, just brush on two coats of this waterproofing sealant for a strong, weatherproof barrier; can be tinted with mortar dye for a seamless look
- SURFACE PREPARATION: Ensure the surface is clean and dry; use a stiff poly or wire brush to remove loose particles; protect the roof with drop cloths to prevent spills; this chimney crown sealer is solvent-free and safe for the surroundings
- DRY TIME & COVERAGE: This waterproof coating sealant cures in 2-4 hours, depending on temperature and humidity; it covers about 40 square feet per gallon

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | CHIMNEYRX |
| Compatible Material | Concrete" Or "Masonry |
| Item Dimensions | 10 x 10 x 10 inches |
| Item Form | Paste |
| Item dimensions L x W x H | 10 x 10 x 10 inches |
| Material | Resin |
| Style | Compact |
| Style Name | Compact |
| Surface Recommendation | Wall |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** CHIMNEYRX
- **Item dimensions L x W x H:** 10 x 10 x 10 inches
- **Material:** Resin
- **Style:** Compact
- **Water Resistance Level:** Waterproof

## Images

![ChimneyRx 300014 Brushable Chimney Crown Repair – Elastomeric & Waterproof Coating for Crowns & Masonry - Fast-Setting & Long-Lasting Protection Crack & Leak Prevention - 2 Gallon - Image 1](https://m.media-amazon.com/images/I/61fMEGk2dRL.jpg)
![ChimneyRx 300014 Brushable Chimney Crown Repair – Elastomeric & Waterproof Coating for Crowns & Masonry - Fast-Setting & Long-Lasting Protection Crack & Leak Prevention - 2 Gallon - Image 2](https://m.media-amazon.com/images/I/61Sb7StZ+FL.jpg)
![ChimneyRx 300014 Brushable Chimney Crown Repair – Elastomeric & Waterproof Coating for Crowns & Masonry - Fast-Setting & Long-Lasting Protection Crack & Leak Prevention - 2 Gallon - Image 3](https://m.media-amazon.com/images/I/711FE1ENbTL.jpg)
![ChimneyRx 300014 Brushable Chimney Crown Repair – Elastomeric & Waterproof Coating for Crowns & Masonry - Fast-Setting & Long-Lasting Protection Crack & Leak Prevention - 2 Gallon - Image 4](https://m.media-amazon.com/images/I/61UDThPp6cL.jpg)
![ChimneyRx 300014 Brushable Chimney Crown Repair – Elastomeric & Waterproof Coating for Crowns & Masonry - Fast-Setting & Long-Lasting Protection Crack & Leak Prevention - 2 Gallon - Image 5](https://m.media-amazon.com/images/I/61d9MAdcMJL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Easy application, solid product.
*by M***K on July 20, 2026*

Easy application. Cures quickly and makes a solid continuous seal along the cap. First coat paints on like paint to ensure all cracks and crevices are filled. Short time later it tacks up to allow for a heavier finish coat. I actually put 3 coats on my chimney cap and still had product left over. If it holds up well this would be a very recommended product.

### ⭐⭐⭐⭐⭐ Superb Product...
*by K***O on July 31, 2019*

This product worked to perfection! The crown of our chimney was severely damaged by a earthquake three years ago and I didn't think to check the chimney for damage...until two months ago when the rains began pouring into the fireplace. After a thorough inspection and online research I decided on CHIMNEYRX...and it was fabulous. Online purchase was easy...delivery on time...instructions clear and concise...and VERY helpful. Very easy to apply and when completed...looked like a pro. Things I did that might be helpful to others...dip your brush in water and shake excess water before applying material...makes for much smoother application and fewer brush strokes. If product begins to dry upon application...it was nearly 90 degrees and dry when I applied...spray your brush with water spritzer used to moisten chimney crown before applying product...again...makes for superior application with minimal brush strokes. Cleanup was very easy and materials are adhering like a fortress. Haven't had heavy rains to test it thoroughly, but I have NO doubt this product will be the answer to all my problems. To ensure a waterproof chimney, I also sprayed a masonry sealant on the bricks...easy to do and should last for years.

### ⭐⭐⭐⭐⭐ Seems to be a good product
*by T***R on October 21, 2018*

Went on easily, the stiff nature of the product meant it went on easier than paint, so no concern about it running or dripping, just didn't have that problem at all. I had a large and very rough chimney crown to seal so my coverage was much less than they advertise due to the roughness. Still, overall, the entire 1 gallon bucket covered what was about 18 square ft of crown with a bit left over. I might have used 3 quarts or so. The chimney was 56 years old and part of the roughness was from prior partial repairs so different parts degraded differently and there was much material to be removed. Still, the repair with this product was successful and it looks great. The next guy that has to use three ladders to go up and inspect the chimney crown in about 20 years will really admire my work!

## Frequently Bought Together

- ChimneyRx 300014 Brushable Chimney Crown Repair – Elastomeric & Waterproof Coating for Crowns & Masonry - Fast-Setting & Long-Lasting Protection Crack & Leak Prevention - 2 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
- 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

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-08-16*