--- product_id: 228360427 title: "MasonryDefender Chimney Crown Sealer - Brushable Waterproof Sealant Prevents Leaks - 1/2 Gallon" brand: "masonrydefender" price: "$145.74" currency: USD in_stock: true reviews_count: 13 category: "Masonry Defender" url: https://www.desertcart.us/products/228360427-masonrydefender-chimney-crown-sealer-brushable-waterproof-sealant-prevents-leaks-1 store_origin: US region: United States of America --- # Elastomeric waterproof membrane Fast drying in 30-60 mins Brush-on easy application MasonryDefender Chimney Crown Sealer - Brushable Waterproof Sealant Prevents Leaks - 1/2 Gallon **Brand:** masonrydefender **Price:** $145.74 **Availability:** ✅ In Stock ## Summary > 🛠️ Seal the deal on leaks before the next storm hits! ## Quick Answers - **What is this?** MasonryDefender Chimney Crown Sealer - Brushable Waterproof Sealant Prevents Leaks - 1/2 Gallon by masonrydefender - **How much does it cost?** $145.74 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/228360427-masonrydefender-chimney-crown-sealer-brushable-waterproof-sealant-prevents-leaks-1) ## 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 - • **Rapid Dry & Cure Time:** Touch dry in under an hour, fully cured in 2-4 hours for quick project turnaround. - • **Long-Term Leak Defense:** Stops water intrusion fast and resists chipping for years of peace of mind. - • **Flexible Waterproof Shield:** Creates a durable, crack-resistant barrier that flexes with your chimney. - • **Covers 20 sq. ft. per ½ Gallon:** Maximize efficiency with generous coverage for small to medium repairs. - • **Effortless Brush-On Application:** No primers needed—just two coats for superior leak protection. ## Overview MasonryDefender Chimney Crown Sealer is a brushable elastomeric waterproof sealant designed to protect concrete chimney crowns from leaks. It forms a flexible, durable membrane that resists cracking and chipping, dries quickly within 30-60 minutes, and covers up to 20 sq. ft. per half gallon. Ideal for minor cracks and imperfections, it requires no primer and offers long-lasting waterproof protection with easy brush application. ## Description Product description Chimney Crown Sealer is a flexible, waterproof coating that is applied to the tops of chimney crowns to protect chimneys from water damage. This flexible membrane is easy to apply with a paint brush and will last for years. It repairs both mortar and concrete crowns. This durable, elastomeric coating can be used to repair minor cracks in chimney crowns to prevent chimney leaks. A half gallon container will cover approximately 20 square feet, (assuming 2 coats). Long Lasting Performance Long lasting protection for chimney crowns. Stays permanently flexible and won’t crack or chip. Prevents Water Leaks Water can come through cracks in your chimney and find it’s way into the interior of your home. This product seals cracks & waterproofs the top of your chimney. Easy to Apply Simply paint 2 coats of the product onto the chimney’s surface with a paint brush. Use duct tape to help create a clean edge. Water Based MasonryDefender Chimney Crown Sealer is a VOC Compliant Water-Based Sealer That’s Easy On the Environment & Easy to Clean Up Coverage Rates & Dry Time This product will cover approximately 20 sq. ft. per half gallon container (assuming 2 coats). Dries to touch in 30 - 60 minutes. Product cures completely within 2 - 4 hours depending on temperature/humidity. About SaverSystems At SaverSystems, we understand the frustration people feel when they see what they've built deteriorate from the elements. Property is one investment you can bank on, but if it's made with concrete, masonry, or wood it needs to be protected. SaverSystems employs state of the art technology to help protect and save what you build. SaverSystems has manufactured premium quality, water repellents and protective coatings for over 30 years. We make coatings for a variety of surfaces including wood, concrete, masonry. In addition to the MasonryDefender brand, SaverSystems also manufactures DEFY, #1 Deck, ChimneyRx, MasonrySaver, & ChimneySaver branded products. All of our products are manufactured in our production facilities located in Richmond, Indiana. Every product is produced under strict quality standards and formulated with the highest quality raw materials available. Our innovative solutions and coatings have stood the test of time, and are trusted by industry professionals and homeowners alike. Review: Gave My Chimney a Spa Day — Now It’s Smug, Sealed, and Storm-Proof for Years - My chimney used to leak like it was emotionally unstable. Rainstorms? Cue the buckets. Snow? Instant anxiety. Then I found this crown sealer — thick, brushable, and clingy in a way that actually helps your relationship with your roof. It spreads on like frosting, fills every crack like it’s got a grudge against moisture, and dries into a rock-solid barrier that laughs in the face of rain, snow, sleet, and freeze-thaw drama. Application was surprisingly easy — just grab a brush and channel your inner Bob Ross. Took me less than an hour and I didn’t even have to Google “how to fix a chimney leak” afterward. Weeks later, storms rolled through and… nothing. Dry as a dad joke in the desert. If your chimney is crying for help, this is the therapy it needs — easy to apply, built to last, and tough enough to survive whatever the sky throws at it. Review: Holds up, does good, easy to use. - This stuff works. ## Features - ELASTOMERIC WATERPROOFING SEALANT: Forms a flexible, waterproof membrane to protect masonry or concrete chimney crowns. Stops water leaks fast and is designed for long-lasting durability. - FLEXIBLE CHIMNEY REPAIR SEALER: Ideal for minor cracks and imperfections on chimney crowns. This chimney crack sealer remains flexible and resists chipping or cracking for years of protection. - EASY BRUSH APPLICATION: No primers or pre-coats needed. Simply brush on two coats of this brushable chimney crown sealer for superior waterproofing, saving time and effort during repairs. - SURFACE PREPARATION TIPS: Ensure the chimney crown is clean, dry, and structurally sound before applying. Use a stiff brush to remove debris and protect the roof with drop cloths during application. - FAST DRY TIME & COVERAGE: Covers up to 20 sq. ft. per 1/2 gal. with two coats, depending on surface texture. Dries to the touch in 30–60 minutes and fully cures in 2–4 hours for quick results. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08F7ZKG7H | | Best Sellers Rank | #41,348 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #152 in Hardware Sealers | | Brand | MasonryDefender | | Brand Name | MasonryDefender | | Color | Light Gray | | Compatible Material | Concrete | | Customer Reviews | 4.7 out of 5 stars 526 Reviews | | Item Form | Paste | | Manufacturer | SaverSystems | | Material | Elastomeric polymer | | Material Type | Elastomeric polymer | | Number of Items | 1 | | Style | Compact | | Style Name | Compact | | Surface Recommendation | Chimney Crown (Concrete) | | UPC | 709057000918 | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** MasonryDefender - **Item Form:** Paste - **Material:** Elastomeric polymer - **Style:** Compact - **Water Resistance Level:** Waterproof ## Images ![MasonryDefender Chimney Crown Sealer - Brushable Waterproof Sealant Prevents Leaks - 1/2 Gallon - Image 1](https://m.media-amazon.com/images/I/61AZ2vR9xiL.jpg) ![MasonryDefender Chimney Crown Sealer - Brushable Waterproof Sealant Prevents Leaks - 1/2 Gallon - Image 2](https://m.media-amazon.com/images/I/81e1uIH08tL.jpg) ![MasonryDefender Chimney Crown Sealer - Brushable Waterproof Sealant Prevents Leaks - 1/2 Gallon - Image 3](https://m.media-amazon.com/images/I/71dGUAd1OxL.jpg) ![MasonryDefender Chimney Crown Sealer - Brushable Waterproof Sealant Prevents Leaks - 1/2 Gallon - Image 4](https://m.media-amazon.com/images/I/81uOiKDbeDL.jpg) ![MasonryDefender Chimney Crown Sealer - Brushable Waterproof Sealant Prevents Leaks - 1/2 Gallon - Image 5](https://m.media-amazon.com/images/I/815doCKWr3L.jpg) ## Questions & Answers **Q: Is this ok to be left out in freezing temperatures overnight before application?** A: probably not, and is not recommended in the application specifications either. Read the specification sheet for the product on the amozon site or on the product site. I will say the product was VERY easy too use. **Q: Should I seal up larger cracks before or after applying this?** A: I would suggest sealing the crack before applying the final top coat of this product. I did that let the sealed crack dry and then did an overall coating with this. Came out great. **Q: How long will this last on my chimney crown? Can you be more specific than just “years”? (Other products say 15 years.)** A: couldn't tell you, ask me in 15 years. **Q: what is the warranty by the manufacturer?** A: Description says 5 years ## Customer Reviews ### ⭐⭐⭐⭐⭐ Gave My Chimney a Spa Day — Now It’s Smug, Sealed, and Storm-Proof for Years *by A***. on May 8, 2025* My chimney used to leak like it was emotionally unstable. Rainstorms? Cue the buckets. Snow? Instant anxiety. Then I found this crown sealer — thick, brushable, and clingy in a way that actually helps your relationship with your roof. It spreads on like frosting, fills every crack like it’s got a grudge against moisture, and dries into a rock-solid barrier that laughs in the face of rain, snow, sleet, and freeze-thaw drama. Application was surprisingly easy — just grab a brush and channel your inner Bob Ross. Took me less than an hour and I didn’t even have to Google “how to fix a chimney leak” afterward. Weeks later, storms rolled through and… nothing. Dry as a dad joke in the desert. If your chimney is crying for help, this is the therapy it needs — easy to apply, built to last, and tough enough to survive whatever the sky throws at it. ### ⭐⭐⭐⭐⭐ Holds up, does good, easy to use. *by J***Y on April 10, 2026* This stuff works. ### ⭐⭐⭐⭐⭐ Prep well and succeed *by I***S on September 15, 2025* While long term results can't be guaranteed, initial impressions are very good. As long as you prepare the surface correctly, this stuff will stick well. One negative review I saw showed the product had been applied to a very dirty surface. Just like painting, surface prep is one of the most important steps in the process. As well as a chimney cap, it was applied to the top of a small retaining wall along our driveway and looks a lot better than bare concrete. ## Frequently Bought Together - 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 - MasonryDefender Chimney Flashing Sealer - Flexible Coating That Protects Chimney Flashings from Water Leaks --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/228360427-masonrydefender-chimney-crown-sealer-brushable-waterproof-sealant-prevents-leaks-1](https://www.desertcart.us/products/228360427-masonrydefender-chimney-crown-sealer-brushable-waterproof-sealant-prevents-leaks-1) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-15*