--- product_id: 228360427 title: "Chimney Crown Sealer" brand: "masonrydefender" price: "£54.55" currency: GBP in_stock: true reviews_count: 13 category: "Masonry Defender" url: https://www.desertcart.co.uk/products/228360427-chimney-crown-sealer store_origin: GB region: Great Britain --- # Elastomeric waterproof membrane Fast drying in 30-60 mins Brush-on easy application Chimney Crown Sealer **Brand:** masonrydefender **Price:** £54.55 **Availability:** ✅ In Stock ## Summary > 🛠️ Seal the deal on leaks before the next storm hits! ## Quick Answers - **What is this?** Chimney Crown Sealer by masonrydefender - **How much does it cost?** £54.55 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/228360427-chimney-crown-sealer) ## 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 MasonryDefender Chimney Crown Sealer - Brushable Waterproof Sealant Prevents Leaks - 1/2 Gallon: desertcart.com: Tools & Home Improvement 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: Prep well and succeed - 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. ## 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 | #38,197 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #140 in Hardware Sealers | | Brand Name | MasonryDefender | | Color | Light Gray | | Compatible Material | Concrete | | Customer Reviews | 4.6 4.6 out of 5 stars (508) | | Item Form | Paste | | Manufacturer | SaverSystems | | Material Type | Elastomeric polymer | | Number of Items | 1 | | 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 ![Chimney Crown Sealer - Image 1](https://m.media-amazon.com/images/I/61AZ2vR9xiL.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. ### ⭐⭐⭐⭐⭐ 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. ### ⭐⭐⭐⭐⭐ Easy to use *by M***I on February 4, 2026* Worked good to restore my chimney cap. ## 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.co.uk/products/228360427-chimney-crown-sealer](https://www.desertcart.co.uk/products/228360427-chimney-crown-sealer) --- *Product available on Desertcart Great Britain* *Store origin: GB* *Last updated: 2026-05-01*