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Item #:
86941215
300119 Masonry Chimney Water Repellent - Siloxane Based, Non-Film-Forming, Breathable, and Transparent Waterproof Coating for Brick Chimneys & Other
85% of respondents would recommend this to a friend
Item #:
86941215
SLE 1252
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ChimneyRx waterproof sealer allows water vapors to escape, preventing trapped moisture, which leads to spalling and scaling.
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What Stands Out
Siloxane Formula
This masonry chimney water repellent utilizes a siloxane-based formula, ensuring a permanent water-resistant barrier while allowing breathability, helping to protect brick from moisture damage without trapping air or moisture.
Non-Film-Forming
Unlike conventional coatings, this product is non-film-forming, which prevents peeling and cracking, ensuring a longer-lasting protective solution that maintains the natural appearance of brick chimneys and surfaces.
Versatile Application
Designed for various vertical surfaces beyond brick chimneys, this 1-gallon waterproof coating is ideal for diverse masonry applications, providing excellent value and versatility for both residential and commercial use.
Product Details
| Product Dimensions (L x W x H) | 7.5 x 3.5 x 12 inches (19.1 x 8.9 x 30.5 cm) |
| Item Weight | 9 pounds (4.08 kg) |
| Manufacturer | CHIMNEYRX |
| Item model number | 300119 |
| Number of pieces | 1 |
Who Should Buy?
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Homeowners
Ideal for homeowners wanting to protect their chimneys from moisture damage and extend lifespan without altering appearance.
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Masonry Professionals
Perfect for masonry contractors needing a high-quality waterproofing solution for brick and concrete surfaces.
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Rooftop Installers
Rooftop workers can use this product for sealing vertical surfaces, minimizing water penetration and improving durability.
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Interior Use
Not suitable for indoor applications, as it is designed specifically for outdoor masonry surfaces.
Product Description
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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Customer Questions & Answers
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Question:
What is Masonry Fireplace Chimney Water Repellent used for?
Answer: Masonry Fireplace Chimney Water Repellent is designed to protect masonry surfaces from water damage. This product creates a barrier that prevents moisture infiltration, thus protecting your chimney, fireplace, and other masonry structures from potential deterioration caused by water absorption. Over time, exposure to rain and humidity can lead to cracking, spalling, and mold growth, which compromises the structural integrity and aesthetics of your masonry. For instance, using this repellent on your chimney can help preserve its appearance while maintaining safety by preventing water-related issues. -
Question:
How does Masonry Fireplace Chimney Water Repellent work?
Answer: The repellent works by forming a hydrophobic barrier on the surface of masonry materials. This barrier repels water while still allowing trapped moisture to escape from the substrate, which is crucial for preventing damage. When applied correctly, it helps in reducing water penetration without impeding the natural breathability of the masonry. It's ideal for use in environments where heavy rains or snow are common, ensuring your chimney stays dry and resilient. For example, applying it before a rainy season can significantly enhance the longevity of your fireplace structure. -
Question:
How do I apply the Masonry Fireplace Chimney Water Repellent?
Answer: To apply the water repellent, ensure the surface is clean, dry, and free from dirt or debris. You can use a brush, roller, or sprayer for application. Start from the top of the chimney or the area you’re treating and work downwards to prevent streaking. It’s crucial to follow the manufacturer’s instructions regarding application rates and drying times. For scenarios involving vertical surfaces, using a sprayer can often provide a more even coat, reducing the risk of missing spots. This thorough application is key to achieving optimal water resistance. -
Question:
Is Masonry Fireplace Chimney Water Repellent safe for the environment?
Answer: Yes, many Masonry Fireplace Chimney Water Repellents are formulated to be eco-friendly and safe for use around plants and animals. When choosing a product, look for ones labeled as non-toxic or environmentally safe. This ensures that while you are protecting your masonry from water damage, you are also being considerate of the surrounding environment. For instance, if you live in an area with wildlife or gardens nearby, selecting an eco-friendly option will help you maintain a safe habitat while safeguarding your home. -
Question:
How often should I apply the water repellent?
Answer: The frequency of application typically depends on environmental conditions and the specific product used. Generally, it's advisable to reapply every few years or after significant weather changes that may affect the integrity of the repellent layer. For example, if your area experiences particularly harsh winters or heavy rains, more frequent applications might be necessary. Regular inspections to check for signs of moisture damage can also guide when to reapply, ensuring your masonry stays protected year-round. -
Question:
Can Masonry Fireplace Chimney Water Repellent be used on other surfaces?
Answer: Absolutely! While primarily designed for masonry chimneys, this repellent can also be used on other masonry surfaces like bricks, stone, and concrete patios. It’s beneficial for any area that is prone to moisture exposure. For example, if you want to protect a stone walkway or the exterior of your home, this product can be an excellent choice. Be sure to check the manufacturer's guidelines to ensure compatibility with the specific materials you plan to treat. -
Question:
Will it change the appearance of my masonry?
Answer: Most Masonry Fireplace Chimney Water Repellents are designed to be low-visibility or water-white once dried. Although some may slightly darken the surface initially, this effect often enhances the natural color and character of the masonry. It is advisable to conduct a small test patch before applying it to the entire surface, ensuring that you're satisfied with the final appearance. This is particularly important for aesthetic-sensitive projects, such as decorative brick facades. -
Question:
Is this product effective against mold and mildew?
Answer: Yes, Masonry Fireplace Chimney Water Repellent can help reduce the likelihood of mold and mildew growth by preventing moisture accumulation in masonry materials. By creating a moisture-resistant barrier, it limits the damp conditions that facilitate mold, making it an excellent choice for areas with high humidity or frequent rainfall. For instance, if your fireplace is situated in a damp basement, using a water repellent can significantly reduce mold risk, thereby enhancing the overall air quality in your space. -
Question:
What should I do if the repellent is exposed to high temperatures?
Answer: Masonry Fireplace Chimney Water Repellent is formulated to withstand typical temperature variations associated with outdoor environments. However, prolonged exposure to extreme temperatures or direct flame can compromise its effectiveness. If you anticipate high heat exposure, such as in closely situated appliances, consider consulting product specifications or conducting tests. This precaution helps ensure that your fire safety remains uncompromised while achieving the desired moisture protection. -
Question:
Where can I buy Masonry Fireplace Chimney Water Repellent - 1 Gallon in Sierra Leone?
Answer: You can purchase Masonry Fireplace Chimney Water Repellent - 1 Gallon from Ubuy. They offer a wide selection of home improvement products, making it convenient to find what you need. Ubuy often features a user-friendly interface, competitive offerings, and a reliable shipping option to ensure your order arrives promptly. Shopping at Ubuy also means you can explore additional home maintenance solutions, ensuring a comprehensive approach to your home improvement projects.
CHIMNEYRX Sealers 300119 Editorial Review
The Masonry Fireplace Chimney Water Repellent has garnered a positive reception among customers, particularly for its effectiveness in stopping leaks in chimneys. Users have reported Considerable success after applying the product, especially in scenarios involving heavy rain. One user shared an experience of previously contending with a leaky chimney cap, only to find their fireplace completely dry after using this water repellent—even after enduring intense rainfall. Many customers express relief and satisfaction with the product, some even describing it as a solution after trying numerous other methods without success. Overall, it has received enthusiastic endorsements for its ability to deliver on its promises, alleviating concerns about costly repairs from water damage. **
Customer Reviews & Ratings
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Pros
- Highly effective at preventing leaks in chimneys.
- Positive feedback on performance during heavy rainfall.
- Users found it superior to other ineffective products previously tried.
- Saves customers from potentially high repair bills.
Cons
- Limited feedback on ease of application.
Platform Trust & Buyer Confidence
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Jazz
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“Easy to use and always helpful and sorts any issues I've had past and present”
1 September 2026 · via Trustpilot
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“Fast, convenient and cheap. Great store!”
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Important information
- Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
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SLE 1252
Order now and get it around Saturday, September 19
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Features & Benefits
- Advanced Siloxane formula penetrates deeply into masonry and concrete.
- Creates a strong water repellent barrier without changing appearance.
- Breathable protection prevents trapped moisture and damage.
- Durable sealant forms strong chemical bonds for long-lasting defense.
- Easy to apply with pump or sprayer; simple cleanup with soap and water.
- Each gallon covers approximately 40 sq. ft., with optimal drying conditions.
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