--- product_id: 274682578 title: "Flex Seal Liquid Large 16oz (Black)" brand: "flex seal liquid" price: "R1121" currency: ZAR in_stock: true reviews_count: 5 category: "Flex Seal Liquid" url: https://www.desertcart.co.za/products/274682578-flex-seal-liquid-large-16oz-black store_origin: ZA region: South Africa --- # Versatile application: brush, roll, dip, pour Waterproof & weatherproof barrier Super strong rubberized coating Flex Seal Liquid Large 16oz (Black) **Brand:** flex seal liquid **Price:** R1121 **Availability:** ✅ In Stock ## Summary > 🛠️ Seal the deal with Flex Seal Liquid — where protection meets perfection! ## Quick Answers - **What is this?** Flex Seal Liquid Large 16oz (Black) by flex seal liquid - **How much does it cost?** R1121 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/274682578-flex-seal-liquid-large-16oz-black) ## Best For - flex seal liquid enthusiasts ## Why This Product - Trusted flex seal liquid brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Precision Coverage:** 16oz covers approx. 20 sq. ft. — perfect for targeted repairs or full surface protection. - • **Unmatched Durability:** Forms a flexible, breathable rubber shield that resists rain, sun, wind, and extreme temps. - • **Effortless Versatility:** Apply by brushing, rolling, dipping, or pouring for seamless coverage on any surface. - • **Weatherproof Confidence:** Blocks air, moisture, UV rays, and natural weathering to keep your projects intact year-round. - • **Professional Grade Finish:** Dries to a glossy, non-slip, industrial-strength barrier that looks as good as it performs. ## Overview Flex Seal Liquid Large 16oz is a patent-pending, black rubberized coating that dries to a durable, flexible, and waterproof barrier. Ideal for sealing cracks, holes, and surfaces, it resists extreme weather, UV damage, and moisture. Versatile application methods and a 16oz size covering approximately 20 sq. ft. make it a must-have for professional-grade repairs and protective projects. ## Description FLEX SEAL LIQUID is a patent pending, proprietary formulation that starts out as a thick liquid and dries to a super strong, flexible, watertight rubberized coating. FLEX SEAL LIQUID can be brushed, rolled, dipped or poured to create a high performance protective rubber barrier that blocks out air, water and moisture on a variety of surfaces and objects. Once cured, FLEX SEAL LIQUID forms a durable, breathable, weatherproof, non slip barrier that's resistant to rain, snow, sun, wind, hail, air, moisture, UV degradation, extreme temperatures and natural weathering. DIRECTIONS: Stir can well, do not shake. Make sure the surface is clean, dry and doesn't have grease, oil and dirt on it. For better adhesion, scuff surface with sand paper or steel wool. Coverage will vary depending on amounts of coats used. 1 Large 16 ounce - approx. 20Sq. Ft., 1 Jumbo 32 ounce - approx. 40Sq. Ft., 1 Gallon can - approx. 150Sq. Ft., Brush or roll FLEX SEAL LIQUID using an even sweeping motion. Apply several even coats until the surface has been completely covered and ALL cracks and holes have been filled. Allow FLEX SEAL LIQUID to dry 24 to 48 hours and apply additional coats as needed. Always brush or roll over a larger area than just where the leak occurred. Dip object directly into the FLEX SEAL LIQUID make a slight swirling motion. Once the surface has been coated, remove and let any excess drip back into the can. Hang or clip the object in the same vertical position as it came out of the can and let dry. Pour FLEX SEAL LIQUID directly on the surface allowing gravity to take FLEX SEAL LIQUID into cracks, holes and hard to reach areas. Continue to pour until the surface has been covered and all cracks and holes have been completely filled. Review: Not cheap but fixed hot tub liner brilliant stuff will definitely buy again and easy to use Review: Love this stuff! Was able to use it to help seal various different parts on my 69 Dodge Dart Project. Has a nice glossy texture and dries pretty quickly. Helps protect my components in my car and keeps them from cracking. It is a good texture for most any projects. I have used it on other applications too. It's nice that it's a versatile project that I can use for almost anything! ## Features - Size: Large - Quantity: 16 Ounce - Colour: Black - Flex Seal Liquid ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B019PFO4KM | | Best Sellers Rank | #34,040 in Automotive ( See Top 100 in Automotive ) #145 in Automotive Fillers, Adhesives & Sealants | | Brand Name | Flex Seal Liquid | | Color | Black | | Compatible Material | Paper | | Customer Reviews | 4.5 4.5 out of 5 stars (2,106) | | Global Trade Identification Number | 00853517006283 | | Item Dimensions | 10.2 x 8.6 x 8.6 centimeters | | Item Form | Liquid | | Item Weight | 1 Pounds | | Manufacturer | Flex Seal Liquid | | Material Type | Rubber | | Model | LFSBLKR16 | | Number of Items | 1 | | Part Number | LFSBLKR16 | | Style Name | Industrial | | Surface Recommendation | Ceiling, Door, Roof, Wall, Window | | UPC | 853517006283 | | Unit Count | 16 Milliliters | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** Flex Seal Liquid - **Item dimensions L x W x H:** 10.2 x 8.6 x 8.6 centimeters - **Item weight:** 1 Pounds - **Material:** Rubber - **Style:** Industrial ## Images ![Flex Seal Liquid Large 16oz (Black) - Image 1](https://m.media-amazon.com/images/I/81UvT2V36QL.jpg) ## Questions & Answers **Q: Could I dip wooden chair legs in this to prevent them from scratching a wood floor?** A: Yes, you can dip wooden chair legs but as you use the chairs the bottom will wear off. If they were my chairs I would use felt pads that you can find in any hardware store. **Q: Would a metal surface become insulated electrically after this was applied? Thinking of a tight car battery compartment...** A: Not enough to protect the battery from eventually shorting out. I would recommend securing a thick piece of rubber between the battery terminal and the metal close to it. **Q: How long dose this take to dry** A: It takes at least 24-48 hours for Flex Seal Liquid to dry based on the thickness of your application. **Q: My child has a basketball post with a plastic base that holds water. The base has a leak. Is this product suggested? If so, any prep suggested?** A: Anything works better with a little prep., sandpaper and clean. It should do well. Also as a add the new tape would probably work better. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by G***N on 25 June 2017* Not cheap but fixed hot tub liner brilliant stuff will definitely buy again and easy to use ### ⭐⭐⭐⭐⭐ Review *by T***G on 21 October 2025* Love this stuff! Was able to use it to help seal various different parts on my 69 Dodge Dart Project. Has a nice glossy texture and dries pretty quickly. Helps protect my components in my car and keeps them from cracking. It is a good texture for most any projects. I have used it on other applications too. It's nice that it's a versatile project that I can use for almost anything! ### ⭐ Review *by M***N on 23 July 2020* Received a crumbled can ## Frequently Bought Together - Flex Seal Liquid, 16 oz, Black, Liquid Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair, Basements, RV, Campers, Trailers, Marine, EPDM, Masonry - Flex Seal 2-Pack Black 17oz Stop Leaks Instantly, Waterproof Sealant Coating For Gutters, RV, Roof, Skylights, Windows --- ## 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.za/products/274682578-flex-seal-liquid-large-16oz-black](https://www.desertcart.co.za/products/274682578-flex-seal-liquid-large-16oz-black) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-04-22*