--- product_id: 12887514 title: "ChimneySaver FlashSeal Elastomeric Roof Chimney Flashing Sealant - Waterproof, Flexible Seal - 1 Gallon (White)" brand: "chimneysaver" price: "$394.01" currency: USD in_stock: true reviews_count: 10 category: "Chimney Saver" url: https://www.desertcart.us/products/12887514-chimneysaver-flashseal-elastomeric-roof-chimney-flashing-sealant-waterproof-flexible-seal store_origin: US region: United States of America --- # 100% waterproof barrier Bonds to metal, brick & shingles 7-year warranty with fabric ChimneySaver FlashSeal Elastomeric Roof Chimney Flashing Sealant - Waterproof, Flexible Seal - 1 Gallon (White) **Brand:** chimneysaver **Price:** $394.01 **Availability:** ✅ In Stock ## Summary > 🛡️ Seal smart, stay dry — your roof’s best defense! ## Quick Answers - **What is this?** ChimneySaver FlashSeal Elastomeric Roof Chimney Flashing Sealant - Waterproof, Flexible Seal - 1 Gallon (White) by chimneysaver - **How much does it cost?** $394.01 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/12887514-chimneysaver-flashseal-elastomeric-roof-chimney-flashing-sealant-waterproof-flexible-seal) ## Best For - chimneysaver enthusiasts ## Why This Product - Trusted chimneysaver brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Extended Roof Life:** Backed by a 7-year warranty when paired with FlashSeal Fabric, protecting your investment and preventing costly repairs. - • **Leakproof Confidence:** Creates a flexible, waterproof membrane that stops leaks around chimneys, vents, and skylights. - • **Effortless Application:** Smooth brush-on liquid sealant cleans up easily with soap and water—DIY friendly for pros and homeowners alike. - • **Seamless Surface Bonding:** Permanently adheres to asphalt shingles, metal flashing, brick, and more for a flawless, camouflaged finish. - • **Durability Meets Flexibility:** Synthetic rubber formula resists cracking and chipping, ensuring long-lasting exterior protection. ## Overview ChimneySaver FlashSeal Elastomeric Roof Chimney Flashing Sealant is a premium, synthetic rubber liquid sealant designed to create a flexible, waterproof barrier around chimneys, vents, and skylights. It bonds permanently to multiple roofing materials including asphalt shingles, metal, and brick, resisting cracking and chipping for long-term durability. Easy to apply and clean up, this 1-gallon sealant is ideal for both professional contractors and DIYers, offering a 7-year warranty when used with FlashSeal Fabric to extend roof life and prevent water damage. ## Description FlashSeal is a versatile and easy-to-use chimney flashing sealer that forms a flexible, waterproof membrane when dry, providing long-lasting protection for your roof and chimney. Specially formulated for permanent adhesion to asphalt shingles, metal flashings, brick, and other roofing materials, this liquid flashing sealant is ideal for repairing leaks around the base of chimneys, stacks, vents, and skylights. FlashSeal makes it simple to restore flashings that have been tarred over, split, cracked, or are in disrepair, acting like a custom-fit rubber boot at the base of your chimney. Its durable rubber material remains permanently flexible, ensuring reliable performance in all weather conditions. The 1 gal. size covers large areas, and the product is backed by a 7-year warranty when used with FlashSeal Reinforcement Fabric. Suitable for both professional contractors and DIY homeowners, FlashSeal is the trusted solution for chimney flashing repair and maintenance, helping to prevent water damage and extend the life of your roof. Review: Excellent product for repairing existing chimney flashing, very happy! - Excellent sealant specifically formulated for chimney flashing repair. I had a small seeping leak of rain drops going along the chimney inside the attic. Wasn't a big deal, but I didn't want to take any chances. I highly recommend this to mend your chimney flashing woes rather than spending thousands on roofing experts. For less than $100 you can do it yourself and be proud of a great job! The application is easy with a standard wide 3" paint brush and goes on like frosting on a cake. Rather easy to use and seals nicely. I highly recommend using the reinforcement fabric to make your seal nice and tight. I was going to go the cheap route and buy some standard drywall seam tape, but it wasn't wide enough for my application. I bought the brown color because my roof is tan/brown and it blends right in like camouflage perfectly! I'm glad to have found this product here, as it can't be purchased anywhere at local big box hardware stores. I'm waiting to see it dry and test it with the next large rain storm to see if it works. This product could also be used around roof vent-pipes or around skylights from what I read. Review: Works like a charm! - I ordered this product to repair a nagging chimney leak that I could not seem to remedy with roofing caulk. After the 3rd failure to fix the leak I ordered the Chimney Saver. After the first rain I didn’t encounter a single leak. Although time will tell the whole story I am so far impressed with this product. It was easy enough to apply and very easy to clean up. I bought the Flash Seal reinforcement mesh that is recommended with this product which also helped to create a nice thick layer around the bottom of the chimney. I used duct tape to make a clean application line around the base which worked like a champ. I had some left over so I sealed the top part of the chimney where the mortar was starting to crack. This stuff is a little pricey but it does the job. Saving the expense of calling a roofer was well worth it. Update: The Dallas area that I live in just got hit with a terrible storm that produced extremely high winds and copious amounts of rain. I am happy to report that the repair job on my chimney held up beautifully. Not one drop of water made it through. I now have to say that this product is battle tested, tried and true. This storm was one of the worst that I can remember in several decades so I would gladly tack on some more stars if I could. ## Features - LEAK PROTECTION FOR CHIMNEYS: Creates a flexible waterproof barrier for chimney flashing repair and sealing around vents, stacks, and skylights to stop water leaks and prevent damage. - DURABLE FLEXIBLE SEAL: Made from synthetic rubber, this chimney flashing sealer resists cracking and chipping, maintaining long-lasting flexibility for reliable exterior protection. - EASY APPLICATION PROCESS: This liquid flashing sealant applies smoothly with a brush. Use a 1/8 in. coating to fill cracks and holes. Cleans up easily with soap and water after use. - STRONG ADHESION TO SURFACES: Bonds permanently to asphalt shingles, metal flashing, brick, and other roofing materials. Available in white, black, and brown to match your roof. - WARRANTY AND PEACE OF MIND: Backed by a 7-year warranty when used with FlashSeal Fabric. Provides lasting protection for chimney flashing repairs and helps extend roof life. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B004SIB2JI | | Best Sellers Rank | #202,737 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #622 in Hardware Sealers | | Brand | ChimneySaver | | Brand Name | ChimneySaver | | Color | White | | Compatible Material | Metal, Brick, Asphalt | | Customer Reviews | 4.7 out of 5 stars 284 Reviews | | Item Dimensions | 48 x 16 x 32 inches | | Item Form | Liquid | | Item Weight | 14 Pounds | | Item dimensions L x W x H | 48 x 16 x 32 inches | | Manufacturer | SAVER SYSTEMS | | Material | Rubber | | Material Type | Rubber | | Model | 24637 | | Number of Items | 1 | | Part Number | 300049 | | Style | Custom | | Style Name | Custom | | Surface Recommendation | Roof, Vent | | UPC | 709057740210 633210543410 | | Unit Count | 128.0 Fluid Ounces | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** ChimneySaver - **Item Weight:** 14 Pounds - **Item dimensions L x W x H:** 48 x 16 x 32 inches - **Material:** Rubber - **Style:** Custom ## Images ![ChimneySaver FlashSeal Elastomeric Roof Chimney Flashing Sealant - Waterproof, Flexible Seal - 1 Gallon (White) - Image 1](https://m.media-amazon.com/images/I/61yvek86fYL.jpg) ## Available Options This product comes in different **Color** options. ## Questions & Answers **Q: does cloth come with the sealant?** A: Negative. As of 12/5/2016, there isn't a 'with cloth' option. **Q: Does the finished seal need to be coated to provide uv protection and extend the life? if so, what coatings are acceptable?** A: No, not to my knowledge. My metal flashing rusted out and I had a temporary patch with some other product (applied like caulking), but that failed in a year. Then I tried this product because I knew it was going to be temporary also because my roof was going to be replaced eventually. So, the reinforcement fabric is a must and follow the directions carefully. It held for 4 years until I eventually replaced my roof. I did not apply any sealant or UV protection product over it. **Q: Has anyone used this around the flashing of a skylight?** A: No, but if you use the correct detail around the skylight curb, I do not see why it would not work. **Q: Where can I get a copy of the Material Safety Data Sheet on Flash Seal?** A: http://chimneysaver.com/product-datasheets/https://saversystems.s3.amazonaws.com/product-data/chimneysaver-flash-seal-sds.pdf ## Customer Reviews ### ⭐⭐⭐⭐⭐ Excellent product for repairing existing chimney flashing, very happy! *by A***M on July 30, 2017* Excellent sealant specifically formulated for chimney flashing repair. I had a small seeping leak of rain drops going along the chimney inside the attic. Wasn't a big deal, but I didn't want to take any chances. I highly recommend this to mend your chimney flashing woes rather than spending thousands on roofing experts. For less than $100 you can do it yourself and be proud of a great job! The application is easy with a standard wide 3" paint brush and goes on like frosting on a cake. Rather easy to use and seals nicely. I highly recommend using the reinforcement fabric to make your seal nice and tight. I was going to go the cheap route and buy some standard drywall seam tape, but it wasn't wide enough for my application. I bought the brown color because my roof is tan/brown and it blends right in like camouflage perfectly! I'm glad to have found this product here, as it can't be purchased anywhere at local big box hardware stores. I'm waiting to see it dry and test it with the next large rain storm to see if it works. This product could also be used around roof vent-pipes or around skylights from what I read. ### ⭐⭐⭐⭐⭐ Works like a charm! *by M***N on June 8, 2019* I ordered this product to repair a nagging chimney leak that I could not seem to remedy with roofing caulk. After the 3rd failure to fix the leak I ordered the Chimney Saver. After the first rain I didn’t encounter a single leak. Although time will tell the whole story I am so far impressed with this product. It was easy enough to apply and very easy to clean up. I bought the Flash Seal reinforcement mesh that is recommended with this product which also helped to create a nice thick layer around the bottom of the chimney. I used duct tape to make a clean application line around the base which worked like a champ. I had some left over so I sealed the top part of the chimney where the mortar was starting to crack. This stuff is a little pricey but it does the job. Saving the expense of calling a roofer was well worth it. Update: The Dallas area that I live in just got hit with a terrible storm that produced extremely high winds and copious amounts of rain. I am happy to report that the repair job on my chimney held up beautifully. Not one drop of water made it through. I now have to say that this product is battle tested, tried and true. This storm was one of the worst that I can remember in several decades so I would gladly tack on some more stars if I could. ### ⭐⭐⭐⭐⭐ Fixed my leaking chimney *by D***C on May 16, 2022* This stuff worked as advertised. I had a leak on the inside of my chimney that no roofer wanted to touch. So I finally purchased this product(with the fabric tape) and applied it to the base of my chimney around the flashing. It worked great and no more leaks. Worth every penny and easy to use. ## Frequently Bought Together - ChimneySaver FlashSeal Elastomeric Flashing Sealant, 1 Gallon (White) - FlashSeal Reinforcement Fabric, 1 roll 6" x 150 ft - ChimneyRx 300119 Masonry Chimney Water Repellent - Siloxane Based, Non-Film-Forming, Breathable, and Transparent Waterproof Coating for Brick Chimneys & Other Vertical Surfaces - 1 Gallon --- ## 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/12887514-chimneysaver-flashseal-elastomeric-roof-chimney-flashing-sealant-waterproof-flexible-seal](https://www.desertcart.us/products/12887514-chimneysaver-flashseal-elastomeric-roof-chimney-flashing-sealant-waterproof-flexible-seal) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-24*