--- product_id: 526863387 title: "Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs, Black, Cartridge" brand: "flex paste" price: "KD 33.40" currency: KWD in_stock: true reviews_count: 5 category: "Flex Paste" url: https://www.desertcart.com.kw/products/526863387-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks-holes-block store_origin: KW region: Kuwait --- # Dries underwater Fully paintable finish Waterproof & UV resistant Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs, Black, Cartridge **Brand:** flex paste **Price:** KD 33.40 **Availability:** ✅ In Stock ## Summary > 🛠️ Seal it. Paint it. Forget it. The ultimate fix for every crack and crevice. ## Quick Answers - **What is this?** Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs, Black, Cartridge by flex paste - **How much does it cost?** KD 33.40 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/526863387-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks-holes-block) ## 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:** Once cured, paint it any color to match your style while preventing rust and UV damage. - • **Freshness Locked In:** Innovative stay-fresh container prevents waste and extends sealing power. - • **Big Gaps? No Problem:** Super thick paste instantly fills large cracks, holes, and gaps with ease. - • **Versatile Surface Hero:** Compatible with wood, metal, concrete, EPDM, and more for all your repair needs. ## Overview Flex Paste is a premium waterproof, paintable rubberized putty designed to seal and protect surfaces from air, water, and UV damage. Its unique formula works underwater, fills large gaps instantly, and comes in a stay-fresh container to maximize usability. Ideal for walls, roofs, RVs, and multiple materials, it offers a durable, flexible barrier that can be painted to blend seamlessly with any project. ## Description Product Description Review: Awesome + Caulking gun Review: Works Great and Lasts ## 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 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B084TDD2FB | | Best Sellers Rank | #22,355 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1,558 in Hardware Adhesives & Sealers | | Brand | Flex Paste | | Brand Name | Flex Paste | | Colour | Black | | Compatible Material | Wood, Glass, Tile, Concrete, Aluminum, Metal, Stucco, Masonry, Copper, Fabric, Fiberglass, Ceramic, Porcelain, Natural Stones, Roofing, Pvc, Eifs, Cspe, Epdm, Hypalon Polyurethanes | | Country of Publication | USA | | Customer Reviews | 4.4 out of 5 stars 722 Reviews | | Included Components | Household Item | | Item Dimensions | 28.6 x 7.6 x 7.6 Centimeters | | Item Form | Paste | | Item Type Name | Flex Paste 9 Oz. Cartridge - Black | | Item Weight | 9 Ounces | | Item dimensions L x W x H | 28.6 x 7.6 x 7.6 Centimeters | | Manufacturer | Swift Response, LLC | | Manufacturer Part Number | PFSBLKR10 | | Material | Rubber | | Material Type | Rubber | | Model | FLEX SEAL - PFSBLKR10 - BLACK | | Number of Items | 1 | | Style | 9 oz Black | | Style Name | 9 oz Black | | Surface Recommendation | Windows,Doors | | UPC | 850010226859 | | Unit Count | 1.0 Count | | Water Resistance Level | Waterproof | ## Product Details - **Material:** Rubber - **Brand:** Flex Paste - **Style:** 9 oz Black - **Item Weight:** 9 Ounces - **Item dimensions L x W x H:** 28.6 x 7.6 x 7.6 Centimeters ## Images ![Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs, Black, Cartridge - Image 1](https://m.media-amazon.com/images/I/61cv+cPofgL.jpg) ![Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs, Black, Cartridge - Image 2](https://m.media-amazon.com/images/I/61dK90UK12L.jpg) ![Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs, Black, Cartridge - Image 3](https://m.media-amazon.com/images/I/914tMpgmSuL.jpg) ![Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs, Black, Cartridge - Image 4](https://m.media-amazon.com/images/I/9107B1PS2wL.jpg) ![Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs, Black, Cartridge - Image 5](https://m.media-amazon.com/images/I/810+KPaaYuL.jpg) ## Available Options This product comes in different **Color** options. ## Questions & Answers **Q: Can I use it around the base of my toilet?** A: You can! We recommend keeping it near the base of the toilet and not spreading it through the floor as it can become slippery when wet. Let us know how the project goes! **Q: can flex glue be used to repair a roho inflatable neoprene wheelchair cushion?** A: not sure, they make a tape like duct tape, that might work. The paste is more for sealing cracks. **Q: can you paint after this is applied?** A: Spray paint might eat the rubber away or anything else that has more of a solvent when you paint I wouldn’t use on this **Q: Will it fix a hole puncture on a 8” subwoofer?** A: Yes read my post about the puncture on my 2016 ford interceptor rear quarter panel worked like a champ on this damage from a corner of a shelf on the wall ## Customer Reviews ### ⭐⭐⭐⭐⭐ Awesome + Caulking gun *by B***L on 29 May 2025* ### ⭐⭐⭐⭐⭐ Works Great and Lasts *by D***E on 23 October 2025* ### ⭐⭐⭐⭐⭐ Really good! *by N***9 on 22 March 2025* ## 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, Cartridge - Flex Seal 2-Pack Black 17oz Stop Leaks Instantly, Waterproof Sealant Coating For Gutters, RV, Roof, Skylights, Windows - 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, Half-Quart --- ## 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.com.kw/products/526863387-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks-holes-block](https://www.desertcart.com.kw/products/526863387-waterproof-paintable-putty-spackle-sealant-fill-gaps-cracks-holes-block) --- *Product available on Desertcart Kuwait* *Store origin: KW* *Last updated: 2026-05-24*