--- product_id: 309008007 title: "Flex Seal Paste, 3 lb Tub, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs" brand: "flex paste" price: "624 zł" currency: PLN in_stock: true reviews_count: 5 category: "Flex Paste" url: https://www.desertcart.pl/products/309008007-flex-seal-paste-3-lb-tub-black-waterproof-paintable-putty store_origin: PL region: Poland --- # 100% Waterproof Sealant UV & Mildew Resistant Multi-Surface Adhesion Flex Seal Paste, 3 lb Tub, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs **Brand:** flex paste **Price:** 624 zł **Availability:** ✅ In Stock ## Summary > 💪 Seal it, fix it, forget it—your ultimate leak-proof sidekick! ## Quick Answers - **What is this?** Flex Seal Paste, 3 lb Tub, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs by flex paste - **How much does it cost?** 624 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/309008007-flex-seal-paste-3-lb-tub-black-waterproof-paintable-putty) ## 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 - • **Compact 3 lb Tub:** Generous volume for multiple repairs without constant reordering—be ready for anything. - • **Seal Leaks Instantly:** Stop water and air infiltration fast with a durable, flexible paste. - • **DIY-Ready & Paintable:** Smooth, paintable finish perfect for professional-looking indoor and outdoor projects. - • **Universal Surface Grip:** Bonds seamlessly to wood, concrete, drywall, EPDM, and more for versatile repairs. - • **Weatherproof & Long-Lasting:** UV and mildew resistant formula ensures your fixes stand the test of time. ## Overview Flex Seal Paste is a robust, black waterproof putty designed to fill gaps, cracks, and holes across a wide range of surfaces including wood, concrete, and EPDM. Its UV and mildew resistant formula ensures durable, weatherproof repairs indoors and outdoors. Ideal for professional and DIY use, this 3 lb tub offers a paintable, flexible seal that blocks water and air infiltration, making it a must-have for any manager’s home maintenance toolkit. ## Description Flex Paste is an excellent waterproof sealant. It can be used on windows, doors, vents, and thresholds. It's easy-to-use and perfect for all types of indorr and outdoor repairs. It's even greawt for DIY projects. Crafts, hobbies, and so much more. Review: Not as easy to apply as I would have liked but if my garage doesn’t flood inthe spring it’s worth it Review: This product works great. Unfortunately, the pail I received had a good part off it already dried up and unusable. That was a bit disappointing as I was short material to get the job done. ## Features - Stop Leaks Fast - Clings to a wide variety of surfaces - UV and mildew resistant - Perfect for all types of indoor and outdoor projects and repairs ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B084TDDCWW | | Brand Name | Flex Paste | | Color | Black | | Compatible Material | Wood | | Customer Reviews | 3.8 3.8 out of 5 stars (476) | | Included Components | Item | | Item Dimensions | 12.7 x 10.8 x 10.8 centimeters | | Item Form | Paste | | Item Type Name | Flex Seal PFSBLKR32 Flex Paste 3 Lb Tub - Black | | Item Weight | 1.36 kg | | Manufacturer | Flex Seal | | Material Type | Plastic | | Model | FLEX SEAL - PFSBLKR32 - BLACK | | Number of Items | 1 | | Part Number | PFSBLKR32 | | Style Name | Compact | | Surface Recommendation | Windows,Doors,Tub | | UPC | 850010226811 | | Unit Count | 48 Grams | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** Flex Paste - **Item dimensions L x W x H:** 12.7 x 10.8 x 10.8 centimeters - **Item weight:** 1.36 kg - **Material:** Plastic - **Style:** Compact ## Images ![Flex Seal Paste, 3 lb Tub, Black, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs - Image 1](https://m.media-amazon.com/images/I/51aauiVmPML.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 M***N on 30 November 2020* Not as easy to apply as I would have liked but if my garage doesn’t flood inthe spring it’s worth it ### ⭐⭐⭐ Review *by S***. on 16 August 2021* This product works great. Unfortunately, the pail I received had a good part off it already dried up and unusable. That was a bit disappointing as I was short material to get the job done. ### ⭐⭐⭐ Review *by R***T on 11 July 2021* J'ai utilisé ce produit pour sceller une fissure de fondation. ## 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.pl/products/309008007-flex-seal-paste-3-lb-tub-black-waterproof-paintable-putty](https://www.desertcart.pl/products/309008007-flex-seal-paste-3-lb-tub-black-waterproof-paintable-putty) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-26*