--- product_id: 527684813 title: "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" brand: "flex paste" price: "1005 Lei" currency: RON in_stock: true reviews_count: 5 category: "Flex Paste" url: https://www.desertcart.ro/products/527684813-flex-paste-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks store_origin: RO region: Romania --- # Dries underwater, no compromise Super thick rubberized paste Waterproof & UV resistant seal 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 **Brand:** flex paste **Price:** 1005 Lei **Availability:** ✅ In Stock ## Summary > 🛠️ Seal the deal with Flex Paste – where durability meets versatility! ## Quick Answers - **What is this?** 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 by flex paste - **How much does it cost?** 1005 Lei with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/527684813-flex-paste-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks) ## 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 - • **Built to Last:** UV resistant and rust-preventive formula ensures long-term durability indoors and outdoors. - • **Seal Like a Pro:** Creates a flexible, watertight barrier that blocks air, water, and moisture effortlessly. - • **Paint It Your Way:** Fully paintable once cured, blending seamlessly with your design aesthetic. - • **Freshness Locked In:** Innovative stay-fresh container keeps the paste ready for your next project with zero waste. - • **Apply Anywhere, Anytime:** Works underwater and on diverse surfaces like concrete, drywall, EPDM, and more. ## Overview Flex Paste is a premium waterproof, paintable rubberized putty designed to fill large gaps, cracks, and holes across multiple surfaces including concrete, drywall, and EPDM. Its unique formula works underwater, resists UV damage, and prevents rust, making it ideal for both indoor and outdoor repairs. Packaged in a stay-fresh container, it ensures long-lasting sealing power with zero waste, perfect for professional-grade and DIY projects alike. ## Description Product Description ## 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 | #66,916 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #55 in Adhesive Caulk | | Brand | Flex Paste | | Brand Name | Flex Paste | | Colour | Black | | Compatible Material | Concrete | | Customer Reviews | 4.0 out of 5 stars 1,859 Reviews | | Included Components | Household Item | | Item Dimensions | 12.7 x 10.8 x 10.8 Centimeters | | Item Form | Paste | | Item Type Name | Flex Paste 3 lb Tub (Black) | | Item Weight | 1.36 kg | | Item dimensions L x W x H | 12.7 x 10.8 x 10.8 Centimeters | | Manufacturer | Swift Response, LLC | | Manufacturer Part Number | PFSBLKR32 | | Material | Rubber | | Material Type | Rubber | | Model | FLEX SEAL - PFSBLKR32 - BLACK | | Number of Items | 1 | | Style | Compact | | Style Name | Compact | | Surface Recommendation | Tub | | UPC | 850010226811 | | Unit Count | 1419.53 Milliliters | | Water Resistance Level | Waterproof | ## Product Details - **Material:** Rubber - **Brand:** Flex Paste - **Style:** Compact - **Item Weight:** 3 Pounds - **Item dimensions L x W x H:** 12.7 x 10.8 x 10.8 Centimeters ## Images ![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 - Image 1](https://m.media-amazon.com/images/I/51aauiVmPML.jpg) ![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 - Image 2](https://m.media-amazon.com/images/I/71id8yOrn8L.jpg) ![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 - Image 3](https://m.media-amazon.com/images/I/71yd+Gnyk+L.jpg) ![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 - Image 4](https://m.media-amazon.com/images/I/71xvXuxwrIL.jpg) ![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 - Image 5](https://m.media-amazon.com/images/I/71mAPcut5pL.jpg) ## 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. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by S***O on 17 March 2026* ### ⭐⭐⭐⭐⭐ Review *by M***N on 30 November 2020* ### ⭐⭐⭐⭐⭐ Review *by F***D on 21 December 2020* ## 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.ro/products/527684813-flex-paste-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks](https://www.desertcart.ro/products/527684813-flex-paste-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks) --- *Product available on Desertcart Romania* *Store origin: RO* *Last updated: 2026-05-13*