---
product_id: 348576302
title: "Chimney Flashing Sealer - Flexible Coating That Protects Chimney Flashings from Water Leaks"
brand: "masonrydefender"
price: "$321"
currency: NZD
in_stock: true
url: https://www.desertcart.nz/products/348576302-chimney-flashing-sealer-flexible-coating-that-protects-chimney-flashings-from
store_origin: NZ
region: New Zealand
---

# easy brush-on application 100% waterproof seal flexible, crack-resistant coating Chimney Flashing Sealer - Flexible Coating That Protects Chimney Flashings from Water Leaks

**Brand:** masonrydefender
**Price:** $321
**Availability:** ✅ In Stock

## Summary

> 💧 Seal the deal on leaks before they start!

## Quick Answers

- **What is this?** Chimney Flashing Sealer - Flexible Coating That Protects Chimney Flashings from Water Leaks by masonrydefender
- **How much does it cost?** $321 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/348576302-chimney-flashing-sealer-flexible-coating-that-protects-chimney-flashings-from)

## Best For

- masonrydefender enthusiasts

## Why This Product

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

## Key Features

- • **Generous Coverage:** Covers up to 14 sq. ft. per half gallon—efficient for multiple projects.
- • **Flexible Durability:** Remains pliable over time—no cracking, chipping, or brittleness.
- • **Ultimate Leak Defense:** Seals chimney flashings to stop water penetration where roof meets chimney.
- • **Versatile Roof Protection:** Also seals skylights, vents, and other roof protrusions for comprehensive waterproofing.
- • **Quick & Simple Application:** Brush on easily for fast, long-lasting protection without special tools.

## Overview

MasonryDefender Chimney Flashing Sealer is a flexible, waterproof coating designed to protect chimney flashings and other roof penetrations from water leaks. Easy to apply with a paint brush, it remains flexible over time to prevent cracking and provides up to 14 sq. ft. of coverage per half gallon. Dries to touch within an hour and fully cures in 6-12 hours, ensuring durable, long-lasting protection.

## Description

MasonryDefender Chimney Flashing Sealer is a flexible, waterproof coating that is applied to chimney flashings (where the chimney meets the roof ) to protect against water leaks. This permanently flexible membrane is easy to apply with a paint brush and will last for years. Available in black. This product not only seals chimney flashings, but can also be used around any other protrusions in roofs including skylights or vents. It provides a long lasting coating that is ready to use and can easily be applied with a paint brush. Covers 14 sq. ft. per half gallon (assuming 2 coats). Dries to touch in 30 - 60 minutes. Product cures completely within 6 - 12 hours depending on temperature/humidity. Caution: Do not use in cold, damp, rainy weather or product may wash away. Allow at least 12 hours of dry, clear weather for proper curing.

## Features

- Seals & Waterproofs Chimney Flashings - Stops Water Penetration Where Chimneys Meet the Roof Line
- Flexible - Won't Crack or Chip - Stays Flexible Over Time, Doesn't Harden and Become Brittle
- Helps Prevent Chimney Leaks - Chimneys Frequently Leak Where the Roofline Meets the Chimney - Seal it to Stop Water Fast
- Easy to Apply With a Paint Brush - Simply Paint Product Around Base of Chimney for Long Lasting Protection
- Available in Black & Covers 14 Sq. Ft. Per Half Gallon Container

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | SaverSystems |
| Item Weight | 2.23 Kilograms |
| Package Dimensions | 17.4 x 16.61 x 13 cm; 2.23 kg |
| Batteries Included? | No |
| Batteries Required? | No |

## Images

![Chimney Flashing Sealer - Flexible Coating That Protects Chimney Flashings from Water Leaks - Image 1](https://m.media-amazon.com/images/I/61me+oHtigL.jpg)
![Chimney Flashing Sealer - Flexible Coating That Protects Chimney Flashings from Water Leaks - Image 2](https://m.media-amazon.com/images/I/91Bmc7RfojL.jpg)
![Chimney Flashing Sealer - Flexible Coating That Protects Chimney Flashings from Water Leaks - Image 3](https://m.media-amazon.com/images/I/81JRxOnNy0L.jpg)
![Chimney Flashing Sealer - Flexible Coating That Protects Chimney Flashings from Water Leaks - Image 4](https://m.media-amazon.com/images/I/91f5Mj1ZAfL.jpg)
![Chimney Flashing Sealer - Flexible Coating That Protects Chimney Flashings from Water Leaks - Image 5](https://m.media-amazon.com/images/I/91mN2GN23hL.jpg)

## Questions & Answers

**Q: Should you use fabric reinforcement tape with this? Like is recommended with FlashSeal?**
A: Are you talking about the mesh material. First cut your pieces or have a pair of scissors I find her easier to use. Get a cheap paint brush take your time paint above flashing onto the brick above the flashing and lay the mesh over. You got about 10-20 seconds to play with it …after that she gets hard to work with, and you’ll make it look worse. If you need to do a second coat wait until it dries then go back and put a second coat. If you try to go back and add more before it’s dry you’ll just mess it up. 
This is the type of information it takes years to acquire through trial and error. if you don’t do it right, it’s a pain to remove  and then you’re really getting into a sticky situation.

So recap. Depending on the size of the chimney, and I would do med/ large sections at a time. I have your pieces ready put your first coat on lay you mesh pieces and make sure you put your second coat thick enough that  you can’t see the mesh.

## Frequently Bought Together

- MasonryDefender Chimney Flashing Sealer - Flexible Coating That Protects Chimney Flashings from Water Leaks
- MasonryDefender Chimney Crown Sealer - Brushable Sealant Fixes Cracked Chimney Tops & Prevents Chimney Leaks
- MasonryDefender Chimney Brick Sealer, Clear Water-Based Siloxane Sealer - Breathable Waterproofer for All Exterior, Vertical Masonry Surfaces - 1 Gal

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**Shop now:** [https://www.desertcart.nz/products/348576302-chimney-flashing-sealer-flexible-coating-that-protects-chimney-flashings-from](https://www.desertcart.nz/products/348576302-chimney-flashing-sealer-flexible-coating-that-protects-chimney-flashings-from)

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-08*