--- product_id: 225321582 title: "Flex Paste Rubberized Waterproof Sealant Paste, Black, Quart, 1-Pack" brand: "flex paste" price: "KSh16521" currency: KES in_stock: true category: "Flex Paste" url: https://www.desertcart.co.ke/products/225321582-flex-paste-rubberized-waterproof-sealant-paste-black-quart-1-pack store_origin: KE region: Kenya --- # Dries underwater Super thick, fills large gaps Waterproof & UV resistant Flex Paste Rubberized Waterproof Sealant Paste, Black, Quart, 1-Pack **Brand:** flex paste **Price:** KSh16521 **Availability:** ✅ In Stock ## Summary > 🛠️ Seal it, protect it, own it — the ultimate fix for every crack! ## Quick Answers - **What is this?** Flex Paste Rubberized Waterproof Sealant Paste, Black, Quart, 1-Pack by flex paste - **How much does it cost?** KSh16521 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.ke](https://www.desertcart.co.ke/products/225321582-flex-paste-rubberized-waterproof-sealant-paste-black-quart-1-pack) ## Best For - flex paste enthusiasts ## Why This Product - Trusted flex paste brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Seal Like a Pro:** Creates a flexible, watertight rubber barrier that blocks air, water, and moisture. - • **Custom Finish Ready:** Fully paintable and UV resistant to match your style and protect surfaces. - • **Built to Last, Made in USA:** Durable rubber formula prevents rust, corrosion, and pest intrusion. - • **Max Coverage, Minimal Waste:** Super thick paste instantly fills large cracks and holes with no mess. - • **Work Anywhere, Even Underwater:** Applies and cures underwater for ultimate versatility in any project. ## Overview Flex Paste Rubberized Waterproof Sealant Paste is a super thick, black rubberized compound designed to fill large gaps, cracks, and holes. It forms a flexible, watertight barrier that works even underwater and is fully paintable and UV resistant. Ideal for indoor and outdoor repairs on a wide range of materials, this 3 lb quart tub offers professional-grade sealing power with a freshness-lock container to prevent waste. ## Description Flex Paste Rubberized Waterproof Sealant Paste, Black, Quart, 1-Pack | Super thick rubber paste, fills gaps, cracks, holes, works underwater, paintable, UV resistant, walls, drywall, roof, RV: desertcart.com: Tools & Home Improvement ## Features - NEW! STAY FRESH CONTAINER – Blocks out air and locks in freshness to extend the sealing power of Flex Paste, with no waste - COAT, SEAL & PROTECT - Penetrates deep to seal out air, water, and moisture. Once dry, it turns into a strong, flexible, watertight, rubberized barrier - WORKS UNDERWATER - Can be applied underwater, and it even dries underwater - FILLS LARGE AREAS - Super thick rubber paste clings to the surface and instantly fills large gaps, cracks, and holes - FULLY PAINTABLE - Once fully cured, it can be painted any color. Helps prevent rust and corrosion, and it is UV resistant - EXCELLENT FOR – filling cracks and holes, foundation and concrete repairs, sealing out rodents and pests, bath and shower, indoor and outdoor projects, roof, RV, motorhome, auto, marine, lawn and garden projects, DIY, hobbies, and more - MADE IN THE USA ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B084TDDCWW | | Best Sellers Rank | #13,014 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #48 in Hardware Sealers | | Brand Name | Flex Paste | | Color | Black | | Compatible Material | Wood, Glass, Tile, Concrete, Aluminum, Metal, Brick, Stucco, Masonry, Copper, Fabric, Fiberglass, Ceramic, Porcelain, Natural Stones, Roofing, Pvc, Eifs, Cspe, Epdm, Hypalon Polyurethanes | | Customer Reviews | 4.0 4.0 out of 5 stars (6,076) | | Included Components | Household Item | | Item Dimensions | 5 x 4.25 x 4.25 inches | | Item Form | Paste | | Item Highlight | Super thick rubber paste, fills gaps, cracks, holes, works underwater, paintable, UV resistant, walls, drywall, roof, RV | | Item Type Name | Flex Paste 3 lb Tub (Black) | | Item Weight | 3 pounds | | Manufacturer | Swift Response, LLC | | Material Type | Rubber | | Model | FLEX SEAL - PFSBLKR32 - BLACK | | Number of Items | 1 | | Part Number | PFSBLKR32 | | Style Name | 3 lb Black | | Surface Recommendation | Windows,Doors,Tub | | UPC | 850010226811 | | Unit Count | 48 Ounce | | Warranty Description | 1 Year Limited | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** Flex Paste - **Item Weight:** 3 pounds - **Item dimensions L x W x H:** 5 x 4.25 x 4.25 inches - **Material:** Rubber - **Style:** 3 lb Black ## Images ![Flex Paste Rubberized Waterproof Sealant Paste, Black, Quart, 1-Pack - Image 1](https://m.media-amazon.com/images/I/41kA-tZKImL.jpg) ![Flex Paste Rubberized Waterproof Sealant Paste, Black, Quart, 1-Pack - Image 2](https://m.media-amazon.com/images/I/51vpU1SYoOL.jpg) ![Flex Paste Rubberized Waterproof Sealant Paste, Black, Quart, 1-Pack - Image 3](https://m.media-amazon.com/images/I/513hHIykqNL.jpg) ![Flex Paste Rubberized Waterproof Sealant Paste, Black, Quart, 1-Pack - Image 4](https://m.media-amazon.com/images/I/51x6NLj+toL.jpg) ![Flex Paste Rubberized Waterproof Sealant Paste, Black, Quart, 1-Pack - Image 5](https://m.media-amazon.com/images/I/41Rb+w6l-BL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Questions & Answers **Q: Could you do several layers or one very thick layer to create a rubberized coating on something?** A: Absolutely, just please remember that the thicker the final coating is, the longer the cure time will be. We highly advise creating the coating by adding layers to the surface rather than just one thick coat. **Q: Any temperature requirement?** A: Flex Paste can be applied in a wide range of temperatures from 0°F – 150ۜ°F. Once applied and fully cured it can withstand a wider range of temperatures from -40°F – 200°F. **Q: Can this be used to fix crack in small ref/frezer** A: Hi there. Thank you so much for reaching out. Flex Paste can withstand low temps like that in a freezer. Although some customers have found success with similar applications, it has not been tested for its safety when coming in contact with items used for food preparation, storing, or serving. Please contact us if you have any additional questions. We're always happy to help. Flex On! **Q: can flex paste be painted ?** A: Yes. Must be fully cured before painting. ## Frequently Bought Together - Flex Paste, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs, Black, Quart - Flex Seal, 14 oz, Clear, Stop Leaks Instantly, Transparent Waterproof Rubber Spray On Sealant Coating, Perfect for Gutters, Wood, RV, Campers, Roof Repair, Skylights, Windows, and More - Flex Seal Liquid, 16 oz, Clear, Liquid Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair, Basements, RV, Campers, Trailers, Marine, EPDM, Masonry --- ## 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.ke/products/225321582-flex-paste-rubberized-waterproof-sealant-paste-black-quart-1-pack](https://www.desertcart.co.ke/products/225321582-flex-paste-rubberized-waterproof-sealant-paste-black-quart-1-pack) --- *Product available on Desertcart Kenya* *Store origin: KE* *Last updated: 2026-10-16*