--- product_id: 2594746 title: "Flex Seal, 14 oz, Black, Stop Leaks Instantly, Waterproof Rubber Spray On Sealant Coating, Perfect for Gutters, Wood, RV, Campers, Roof Repair, Skylights, Windows, and More" brand: "flex seal" price: "$40.73" currency: USD in_stock: true reviews_count: 13 category: "Flex Seal" url: https://www.desertcart.us/products/2594746-flex-seal-14-oz-black-stop-leaks-instantly-waterproof-rubber store_origin: US region: United States of America --- # 100% waterproof & flexible Heat & cold resistant 14 oz spray-on sealant Flex Seal, 14 oz, Black, Stop Leaks Instantly, Waterproof Rubber Spray On Sealant Coating, Perfect for Gutters, Wood, RV, Campers, Roof Repair, Skylights, Windows, and More **Brand:** flex seal **Price:** $40.73 **Availability:** ✅ In Stock ## Summary > 💧 Seal it. Protect it. Flex it. The ultimate fix for leaks that won’t quit. ## Quick Answers - **What is this?** Flex Seal, 14 oz, Black, Stop Leaks Instantly, Waterproof Rubber Spray On Sealant Coating, Perfect for Gutters, Wood, RV, Campers, Roof Repair, Skylights, Windows, and More by flex seal - **How much does it cost?** $40.73 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/2594746-flex-seal-14-oz-black-stop-leaks-instantly-waterproof-rubber) ## Best For - flex seal enthusiasts ## Why This Product - Trusted flex seal brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Paintable Finish:** Customize your repair with any color once dry—blend seamlessly with your home or gear. - • **Instant Leak Stopper:** Sprays on easily to seal cracks and holes fast, saving your projects from water damage. - • **All-Weather Protection:** Withstands extreme heat and freezing cold without sagging or losing adhesion. - • **Multi-Surface Versatility:** Perfect for gutters, roofs, wood, RVs, windows, and even creative DIY projects. - • **Flexible Rubberized Coating:** Dries to a durable, pliable layer that moves with surfaces—no cracking or peeling, year-round. ## Overview Flex Seal is a 14 oz black spray-on rubberized sealant designed to instantly stop leaks and waterproof surfaces. It forms a flexible, durable coating that resists cracking, peeling, and weather extremes, making it ideal for gutters, roofs, wood, RVs, and more. Paintable and easy to apply, it’s a trusted solution with over 38,000 positive reviews and a #1 rank in hardware sealers. ## Description Product description Coats, seals, and protects. Sprays out as a liquid that seeps into holes and cracks, then dries to form a watertight, flexible, rubberized coating. Shields against rust and corrosion. Great for auto repairs and restorations. Extends the life of vehicles by providing an added layer of protection. Works indoors and outdoors. Won’t sag or drip in summer heat nor crack and peel in winter, making it exceptional for weatherizing your home. Apply to almost any surface. Use on: wood, metal, tile, concrete, masonry, fabric, glass, plastic, aluminum, drywall, and more. Fully paintable. After repairs are done, simply paint the color of your choice for fixes that are virtually undetectable. Made in the USA Flex Seal spray is proudly made in America, using globally sourced products. DIRECTIONS Make sure the surface is clean, dry, and free of grease, oil, and dirt. Shake well. Spray 8” to 12” from surface, using an even, sweeping motion. Apply multiple, even coats until ALL cracks and holes have been filled. Let it dry completely. (It usually takes up to 24 to 48 hours to fully cure.) Important information: *If the product you received is not our newest can design, don’t sweat it. It’s the same legendary formula. Review: Good product - This product works well. I used it to cover the tops of dock pilings. I recommend it. Review: Works as good as on TV - I used this to seal a leak in my concrete fountain. I was a bit hesitant having only seen it on TV commercials and no one else's experience. I cleaned around the crack, sprayed 2-3 layers over it and refilled. It's been several months and no leak. ## Features - The easy way to coat, seal, protect, and stop leaks fast! Once dry, can be painted any color - Seeps into cracks and holes. Dries to a watertight, flexible, rubberized coating. Stays flexible and pliable; lasts many years - Transform and protect virtually everything! Ideal for arts & crafts, projects & hobbies - Protects surface from corrosion, can be used on wet or dry surfaces - Will not sag or drip in the Summer heat. Will not crack or peel in the Winter cold ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00CD9FGNW | | Best Sellers Rank | #112 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1 in Hardware Sealers | | Brand | Flex Seal | | Brand Name | Flex Seal | | Color | Black | | Compatible Material | Rubber | | Customer Reviews | 4.4 out of 5 stars 38,966 Reviews | | Global Trade Identification Number | 00855647003019 | | Included Components | Flex Seal Spray Rubber Sealant Coating, 14-oz, Black | | Item Dimensions | 9.5 x 2.5 x 2.5 inches | | Item Form | Spray | | Item Type Name | Flex Seal Spray Rubber Sealant Coating, 14-oz, Black | | Item Weight | 14 Ounces | | Item dimensions L x W x H | 9.5 x 2.5 x 2.5 inches | | Manufacturer | Swift Response, LLC | | Material | Plastic | | Material Type | Plastic | | Model | FLEX SEAL - FSR20 | | Number of Items | 1 | | Part Number | FSR20 | | Style | Black, 14 oz, 1-Pack | | Style Name | Black, 14 oz, 1-Pack | | Surface Recommendation | Roof,Windows,Wood | | UPC | 855647003019 | | Unit Count | 28.0 Ounce | | Warranty Description | 1 Year Limited | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** Flex Seal - **Item Weight:** 14 Ounces - **Item dimensions L x W x H:** 9.5 x 2.5 x 2.5 inches - **Material:** Plastic - **Style:** Black, 14 oz, 1-Pack ## Images ![Flex Seal, 14 oz, Black, Stop Leaks Instantly, Waterproof Rubber Spray On Sealant Coating, Perfect for Gutters, Wood, RV, Campers, Roof Repair, Skylights, Windows, and More - Image 1](https://m.media-amazon.com/images/I/71e9eU84KQL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Questions & Answers **Q: The grout throughout the rim area between the glass and the metal frame of my glass windows has deteriorated and leaks. Will it seal this?** A: Hello, thank you for reaching out! Many people have had success using https://www.amazon.com/dp/B00OX6OU5S to seal their grout. **Q: I have a leak on my shower drain, would this work to seal the leak on PVC pipe?** A: Yes many people have had great success sealing their pipes with Flex Seal. **Q: Will flex seal work on concrete? I have a leak in my koi pond, would flex seal hold the leak while being underwater?** A: Yes many people have had great success using Flex Seal on concrete. We recommend using Flex Seal Liquid on your koi pond though since it is plant and animal safe. Flex Seal in the aerosol can is not animal safe. **Q: I have a couple of cracks in a plastic pond shell. Around 100 gallon pond. Would this seal them?** A: the tape might do the job--I sprayed on to a faux leather chair -- it's peeling off--I might get more tape seal.. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good product *by A***R on May 18, 2026* This product works well. I used it to cover the tops of dock pilings. I recommend it. ### ⭐⭐⭐⭐⭐ Works as good as on TV *by D***T on May 18, 2026* I used this to seal a leak in my concrete fountain. I was a bit hesitant having only seen it on TV commercials and no one else's experience. I cleaned around the crack, sprayed 2-3 layers over it and refilled. It's been several months and no leak. ### ⭐⭐⭐⭐ It works fine *by C***R on March 9, 2026* Good product ..fit for purpose ## Frequently Bought Together - Flex Seal, 14 oz, Black, Stop Leaks Instantly, Waterproof Rubber Spray On Sealant Coating, Perfect for Gutters, Wood, RV, Campers, Roof Repair, Skylights, Windows, and More - Flex Tape, Original Thick Flexible Rubberized Waterproof Tape - Seal and Patch Leaks, Works Underwater, Indoor Outdoor - Home RV Roof Plumbing and Pool Repairs, Black, 4 in x 5 ft, Pack of 1 --- ## 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/2594746-flex-seal-14-oz-black-stop-leaks-instantly-waterproof-rubber](https://www.desertcart.us/products/2594746-flex-seal-14-oz-black-stop-leaks-instantly-waterproof-rubber) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-06-02*