--- product_id: 2594746 title: "Flex Seal Spray Rubber Sealant Coating, Waterproof, Black, 14 oz, 1-Pack" brand: "flex seal" price: "¥7304" currency: JPY in_stock: true reviews_count: 13 category: "Flex Seal" url: https://www.desertcart.jp/products/2594746-flex-seal-spray-rubber-sealant-coating-waterproof-black-14-oz store_origin: JP region: Japan --- # Watertight & flexible seal Heat & cold resistant 14 oz powerful spray Flex Seal Spray Rubber Sealant Coating, Waterproof, Black, 14 oz, 1-Pack **Brand:** flex seal **Price:** ¥7304 **Availability:** ✅ In Stock ## Summary > 💧 Seal it. Protect it. Flex it. Never leak again! ## Quick Answers - **What is this?** Flex Seal Spray Rubber Sealant Coating, Waterproof, Black, 14 oz, 1-Pack by flex seal - **How much does it cost?** ¥7304 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/2594746-flex-seal-spray-rubber-sealant-coating-waterproof-black-14-oz) ## 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:** Once dry, customize with any paint color for seamless repair - • **Instant Leak Stopper:** Sprays on fast to seal cracks and holes immediately - • **All-Weather Protection:** Won't sag in summer heat or crack in winter cold - • **Flexible Rubberized Coating:** Dries to a durable, pliable layer that moves with surfaces - • **Versatile Surface Compatibility:** Perfect for gutters, roofs, wood, RVs, windows, and more ## Overview Flex Seal is a 14 oz black spray-on rubber sealant designed to instantly stop leaks by creating a waterproof, flexible coating. Ideal for a wide range of surfaces including gutters, wood, roofs, and RVs, it withstands extreme temperatures without cracking or peeling. Once dry, it can be painted over, offering a durable, long-lasting protective barrier that keeps your home and gear leak-free year-round. ## Description Flex Seal Spray Rubber Sealant Coating, Waterproof, Black, 14 oz, 1-Pack | Stops leaks fast, seals out water, air, moisture, prevents rust, paintable, flexible, gutters, roof repair, RV, wood, metal - Deck Waterproof Sealants - desertcart.com Review: GOT WATER LEAKS, FLEX SEAL STOPS THE LEAKS !!!!! - I used the Flex Seal on my 21 year old GMC pickup truck where when it rained it would leak the rain water at the driver side of the windshield. I tried taping around the rubber or plastic seal that the glass is set in, but still leaks. Then I saw a Flex Seal commercial on tv and the video up first was sealing a windshield with the "clear" type of Flex seal. After taping all around the windshield with blue painters tape, as you don't want any spray getting on the painted part, I put 3 coats of the "clear" Flex Seal above and below the windshield's rubber seal. Wait about 4 to 6 hours between applying the coats of the Flex Seal. I tested the seal this morning with my water hose...... NO LEAKS ANY WHERE !!!! THIS STUFF WORKS !!!!!! Thank you desertcart FLEX SEAL IS A WINNER !!!!!! Review: Definetly keeping a can in the camper now - I purchased this 14 oz can of white Flex Seal to repair some cracks on my popup camper’s roof after I accidentally backed into a tree. I was worried about the damage, but this product ended up being the perfect solution for the situation. It went on very easily, and I’ve been impressed with how well it holds up; after 34 days, there are absolutely no signs of peeling or poor adhesion. Most importantly, I haven't seen a single leak from the repaired spot since I applied it. It’s also incredibly discreet, as I can hardly even see where the damage was anymore. It worked perfectly to hide and fix my mistake, and I’m very satisfied with how it turned out. ## 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 | #145 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 39,685 Reviews | | Global Trade Identification Number | 00855647003019 | | Included Components | Sealant | | 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 | Flex Tape | | 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 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 Spray Rubber Sealant Coating, Waterproof, Black, 14 oz, 1-Pack - Image 1](https://m.media-amazon.com/images/I/71e9eU84KQL.jpg) ![Flex Seal Spray Rubber Sealant Coating, Waterproof, Black, 14 oz, 1-Pack - Image 2](https://m.media-amazon.com/images/I/71bI6mxBMkL.jpg) ![Flex Seal Spray Rubber Sealant Coating, Waterproof, Black, 14 oz, 1-Pack - Image 3](https://m.media-amazon.com/images/I/91fIxwhGEvL.jpg) ![Flex Seal Spray Rubber Sealant Coating, Waterproof, Black, 14 oz, 1-Pack - Image 4](https://m.media-amazon.com/images/I/81J+mHq9AtL.jpg) ![Flex Seal Spray Rubber Sealant Coating, Waterproof, Black, 14 oz, 1-Pack - Image 5](https://m.media-amazon.com/images/I/918I1RiBOtL.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 ### ⭐⭐⭐⭐⭐ GOT WATER LEAKS, FLEX SEAL STOPS THE LEAKS !!!!! *by H***Y on July 29, 2026* I used the Flex Seal on my 21 year old GMC pickup truck where when it rained it would leak the rain water at the driver side of the windshield. I tried taping around the rubber or plastic seal that the glass is set in, but still leaks. Then I saw a Flex Seal commercial on tv and the video up first was sealing a windshield with the "clear" type of Flex seal. After taping all around the windshield with blue painters tape, as you don't want any spray getting on the painted part, I put 3 coats of the "clear" Flex Seal above and below the windshield's rubber seal. Wait about 4 to 6 hours between applying the coats of the Flex Seal. I tested the seal this morning with my water hose...... NO LEAKS ANY WHERE !!!! THIS STUFF WORKS !!!!!! Thank you AMAZON FLEX SEAL IS A WINNER !!!!!! ### ⭐⭐⭐⭐⭐ Definetly keeping a can in the camper now *by D***Y on July 6, 2026* I purchased this 14 oz can of white Flex Seal to repair some cracks on my popup camper’s roof after I accidentally backed into a tree. I was worried about the damage, but this product ended up being the perfect solution for the situation. It went on very easily, and I’ve been impressed with how well it holds up; after 34 days, there are absolutely no signs of peeling or poor adhesion. Most importantly, I haven't seen a single leak from the repaired spot since I applied it. It’s also incredibly discreet, as I can hardly even see where the damage was anymore. It worked perfectly to hide and fix my mistake, and I’m very satisfied with how it turned out. ### ⭐⭐⭐⭐ For the right job, it's the tool *by R***K on April 29, 2026* Left no room for doubt that this is liquefied rubber in an aerosol. Be careful to get the Right Tool for the job. Check their "store" on Amazon- interesting discoveries there. For waterproofing / moisture barrier I would consider this again if a thin layer is adequate. May need to develop some application "technique" in some instances. My unusual situation involved some gaps that were worse than I anticipated. It's thin. Layering onto partially dry base layers to bulk it up did work but it's tricky until you find the way. I should have had silicone caulk on hand too but this seals hairline gaps nicely. With clear version, it's hard to see what's happening & to avoid waste or a running mess. Clogging is not a problem you'll likely have. As you might expect, liquid rubber involves intense solvents. You cannot over ventilate when using this. Plan ahead if using indoors. ## 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.jp/products/2594746-flex-seal-spray-rubber-sealant-coating-waterproof-black-14-oz](https://www.desertcart.jp/products/2594746-flex-seal-spray-rubber-sealant-coating-waterproof-black-14-oz) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-29*