--- product_id: 312007933 title: "Flex Paste MAX, 12 lb Can, White, 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: "€ 338.74" currency: EUR in_stock: true reviews_count: 8 category: "Flex Paste" url: https://www.desertcart.be/products/312007933-flex-paste-max-12-lb-can-white-waterproof-paintable-putty store_origin: BE region: Belgium --- # Dries & Works Underwater Super Thick, Flexible Rubber Paste Waterproof & UV Resistant Seal Flex Paste MAX, 12 lb Can, White, 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:** € 338.74 **Availability:** ✅ In Stock ## Summary > 🛠️ Seal smarter, not harder — Flex Paste MAX has your repairs covered! ## Quick Answers - **What is this?** Flex Paste MAX, 12 lb Can, White, 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?** € 338.74 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/312007933-flex-paste-max-12-lb-can-white-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 - • **Seal Like a Pro:** Creates a durable, watertight rubberized barrier that blocks air, water, and moisture. - • **Paint It Your Way:** Fully paintable once cured, blending seamlessly with your décor while preventing rust and UV damage. - • **Instant Gap Filler:** Super thick formula clings and fills large cracks, holes, and gaps instantly—even underwater. - • **Freshness Locked In:** Innovative Stay Fresh container prevents waste by blocking air and preserving sealing power. - • **Versatile Surface Master:** Adheres to wood, concrete, metal, drywall, EPDM, and more for indoor/outdoor fixes. ## Overview Flex Paste MAX is a 12 lb waterproof, paintable rubberized putty designed to fill and seal large cracks, gaps, and holes across multiple surfaces. Its unique Stay Fresh container locks in freshness to maximize shelf life and sealing power. This flexible, UV-resistant sealant works underwater and dries to a durable barrier that blocks air, water, and moisture, making it ideal for walls, roofs, RVs, concrete, and more. Made in the USA, it’s the go-to solution for professional-grade, long-lasting repairs that blend perfectly with any finish. ## Description Product description Works indoors and outdoors. Penetrates deep to seal out air, water, and moisture. Once dry, it turns into a strong, flexible, watertight, rubberized barrier. Apply to almost any surface. Use on: Wood, glass, tile, concrete, aluminum, metal, brick, stucco, masonry, PVC and so much more. Clings to wet and dry surfaces. Even underwater. No need to wait for surfaces to completely dry before sealing them. It even cures underwater. Can be spread, shaped, and formed. This thick rubberized paste is exceptional for all types of crafts, hobbies, and more. Won’t shrink, crack, or become brittle. Flex Paste stays completely flexible, making it perfect for all-season roof repairs and all types of DIY projects. Made in the USA Flex Paste is proudly made in America, using globally sourced products. DIRECTIONS Using putty knife, trowel or similar tool, remove an even layer from the top surface. Do not scoop deeply into the tub as this may create air pockets. Apply a generous amount to the surface using a smooth motion. Always make sure all cracks & holes have been completely filled & cured before testing. Review: A plus - Perfect Review: Great buy - When you are trying to repair your parents’ old house , and trying to keep costs down., this is one of the best things to use . It’s not goopy but easy to transfer, spread , and plugs the holes , tears, or whatever the damage that you found. We used some on one of our bathrooms too. Fantastic !! ## 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 | B084TDHKVJ | | Best Sellers Rank | #445,476 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,184 in Hardware Sealers | | Brand | Flex Paste | | Brand Name | Flex Paste | | Color | White | | 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 | 4.2 out of 5 stars 120 Reviews | | Included Components | Household Item | | Item Dimensions | 7.75 x 6.75 x 6.75 inches | | Item Form | Paste | | Item Type Name | Flex Seal Paste MAX 12 lb Tub (White) FLEX SEAL - PFSMAXWHT01 | | Item Weight | 12 Pounds | | Item dimensions L x W x H | 7.75 x 6.75 x 6.75 inches | | Manufacturer | Swift Response, LLC | | Material | Rubber | | Material Type | Rubber | | Model | FLEX SEAL - PFSMAXWHT01 - WHITE | | Number of Items | 1 | | Part Number | PFSMAXWHT01 | | Style | 12 lb WHT | | Style Name | 12 lb WHT | | Surface Recommendation | Tub | | UPC | 850010226897 | | Unit Count | 192.0 Ounce | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** Flex Paste - **Item Weight:** 12 Pounds - **Item dimensions L x W x H:** 7.75 x 6.75 x 6.75 inches - **Material:** Rubber - **Style:** 12 lb WHT ## Images ![Flex Paste MAX, 12 lb Can, White, 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/81vv0bSfptL.jpg) ![Flex Paste MAX, 12 lb Can, White, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs - Image 2](https://m.media-amazon.com/images/I/81riPhn3yfL.jpg) ![Flex Paste MAX, 12 lb Can, White, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs - Image 3](https://m.media-amazon.com/images/I/71D0F0Q1feL.jpg) ![Flex Paste MAX, 12 lb Can, White, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs - Image 4](https://m.media-amazon.com/images/I/81tplSJMsDL.jpg) ![Flex Paste MAX, 12 lb Can, White, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs - Image 5](https://m.media-amazon.com/images/I/91S6B0JXcFL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ A plus *by R***D on April 19, 2026* Perfect ### ⭐⭐⭐⭐⭐ Great buy *by D***Z on October 19, 2021* When you are trying to repair your parents’ old house , and trying to keep costs down., this is one of the best things to use . It’s not goopy but easy to transfer, spread , and plugs the holes , tears, or whatever the damage that you found. We used some on one of our bathrooms too. Fantastic !! ### ⭐ Shame! shame! shame! *by A***R on September 27, 2024* Rating is "0". Product could not be used. It was as hard as a brick. We tried to make a hole toward the bottom to see if it was softer, it was as hard as the top. We tried to spread it on the roof, it would not work. We has to run to Walmart to get new cans to do the job. ## Frequently Bought Together - Flex Paste MAX, 12 lb Can, White, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs - Flex Tape, MAX, 4 in x 25 ft, Clear, Original Thick Flexible Rubberized Waterproof Tape - Seal and Patch Leaks, Works Underwater, Indoor Outdoor Projects - Home RV Roof Plumbing and Pool Repairs - Flex Tape, MAX, 4 in x 25 ft, White, Original Thick Flexible Rubberized Waterproof Tape - Seal and Patch Leaks, Works Underwater, Indoor Outdoor Projects - Home RV Roof Plumbing and Pool Repairs --- ## 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.be/products/312007933-flex-paste-max-12-lb-can-white-waterproof-paintable-putty](https://www.desertcart.be/products/312007933-flex-paste-max-12-lb-can-white-waterproof-paintable-putty) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-05-10*