---
product_id: 8120729
title: "ChimneyRx 300119 Masonry Chimney Water Repellent - Siloxane Based, Non-Film-Forming, Breathable, and Transparent Waterproof Coating for Brick Chimneys & Other Vertical Surfaces - 1 Gallon"
brand: "chimneyrx"
price: "535.80 DT"
currency: TND
in_stock: true
category: "Chimneyrx"
url: https://www.desertcart.tn/products/8120729-chimneyrx-300119-masonry-chimney-water-repellent-siloxane-based-non-film
store_origin: TN
region: Tunisia
---

# Penetrates 1/4 inch deep Breathable, vapor-permeable barrier Long-lasting chemical bond ChimneyRx 300119 Masonry Chimney Water Repellent - Siloxane Based, Non-Film-Forming, Breathable, and Transparent Waterproof Coating for Brick Chimneys & Other Vertical Surfaces - 1 Gallon

**Brand:** chimneyrx
**Price:** 535.80 DT
**Availability:** ✅ In Stock

## Summary

> 🧱 Shield your chimney with invisible armor—because your home deserves the best!

## Quick Answers

- **What is this?** ChimneyRx 300119 Masonry Chimney Water Repellent - Siloxane Based, Non-Film-Forming, Breathable, and Transparent Waterproof Coating for Brick Chimneys & Other Vertical Surfaces - 1 Gallon by chimneyrx
- **How much does it cost?** 535.80 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/8120729-chimneyrx-300119-masonry-chimney-water-repellent-siloxane-based-non-film)

## 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

- • **Effortless Application:** Spray on easily with pump or airless sprayer; quick 2-coat process with soap-and-water cleanup
- • **Breathable Waterproofing:** Allows moisture vapor to escape, preventing freeze-thaw damage and spalling
- • **Deep Siloxane Penetration:** Seals up to 1/4 inch inside masonry for invisible, durable protection
- • **Invisible & Non-Film-Forming:** Keeps your brick or stone’s natural look intact—no white film or discoloration
- • **Reliable Coverage & Dry Time:** Covers 40 sq. ft. per gallon; dries in 2-6 hours for fast, weather-ready results

## Overview

ChimneyRx 300119 is a siloxane-based, breathable masonry water repellent that penetrates deeply to form a durable, transparent barrier. Designed for brick chimneys and vertical surfaces, it prevents water damage without altering appearance, allowing vapor to escape and reducing freeze-thaw risks. Easy to apply and clean, it covers 40 sq. ft. per gallon and dries within hours, ensuring long-lasting protection and peace of mind.

## Description

desertcart.com: ChimneyRx 300119 Masonry Chimney Water Repellent - Siloxane Based, Non-Film-Forming, Breathable, and Transparent Waterproof Coating for Brick Chimneys & Other Vertical Surfaces - 1 Gallon : Tools & Home Improvement

## Features

- ADVANCED SILOXANE FORMULA: Siloxane masonry sealer deeply penetrates up to 1/4 inch into masonry and concrete, creating a strong, breathable water repellent barrier that provides lasting protection without altering the appearance of brick or stone
- BREATHABLE PROTECTION: Unlike film-forming sealers, ChimneyRx waterproof sealer allows water vapors to escape, preventing trapped moisture, which leads to spalling and scaling, while reducing the risk of freeze-thaw damage during colder months
- DURABLE & LONG LASTING: Our chimney waterproofing sealant forms strong chemical bonds beneath the surface, becoming a part of the physical structure, providing long-lasting protection against water damage to chimneys, ensuring years of defense
- EASY APPLICATION & CLEANUP: Apply the chimney sealer with a pump or airless sprayer; lay a drop cloth around the base, spray from the bottom up, and cover thoroughly; apply a second coat within 3-5 minutes; cleanup is easy with just soap and water
- DRY TIME & COVERAGE: This masonry sealant covers approximately 40 sq. ft. per gallon; apply in temperatures between 40-90°F, allow 2-6 hours drying time depending on humidity for optimal protection (apply at least 6 hours before rainfall)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0060BUZ9E |
| Additional Features | Waterproofing |
| Best Sellers Rank | #53,932 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #198 in Hardware Sealers |
| Brand Name | CHIMNEYRX |
| Color | White |
| Controls Type | Push Button |
| Customer Reviews | 4.7 4.7 out of 5 stars (710) |
| Included Components | 1 Gallon |
| Item Dimensions D x W x H | 4"D x 7"W x 12"H |
| Manufacturer | CHIMNEYRX |
| Manufacturer Part Number | 300119 |
| Material Type | concrete |
| Mounting Type | Wall Mount |
| Number of Items | 1 |
| Number of Packs | 1 |
| Specification Met | rx |
| UPC | 709057221283 |
| Vent Hood Design | Wall Mounted Canopy Hood |
| Ventilation Type | Ductless/Recirculating |

## Product Details

- **Brand:** CHIMNEYRX
- **Color:** White
- **Material:** concrete
- **Product Dimensions:** 4"D x 7"W x 12"H
- **Special Feature:** Waterproofing

## Images

![ChimneyRx 300119 Masonry Chimney Water Repellent - Siloxane Based, Non-Film-Forming, Breathable, and Transparent Waterproof Coating for Brick Chimneys & Other Vertical Surfaces - 1 Gallon - Image 1](https://m.media-amazon.com/images/I/61BkjhoLyzL.jpg)

## Questions & Answers

**Q: Can I use this to seal the top of my chimney?**
A: This product is for sealing bricks which is fine for the brick part of the chimney. For the crown you should use this product; http://www.amazon.com/ChimneyRx-Brushable-Masonry-Fireplace-Repair/dp/B004XJYJBA/ref=sr_1_1?s=hi&ie=UTF8&qid=1459433037&sr=1-1&keywords=ChimneyRx+Brushable+Masonry+Fireplace+Crown+Repair

**Q: is this product made by system savers in richmond indiana?**
A: Yes it is!!!

**Q: It says vertical surfaces.  I wonder if I can use it on our brick front stoop and steps?**
A: It works on vertical and horizontal surfaces but is designed to shed water from vertical surfaces better and won't protect from standing water on horizontal surfaces.

**Q: Is this available in larger quantities ?**
A: No, it is not available in larger quantities.

## Frequently Bought Together

- 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 300014 Brushable Chimney Crown Repair – Elastomeric & Waterproof Coating for Crowns & Masonry - Fast-Setting & Long-Lasting Protection Crack & Leak Prevention - 1 Gallon

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-09-27*