--- product_id: 214989979 title: "Flex Paste Rubberized Waterproof Sealant Paste, White, Half-Quart, 1-Pack" brand: "flex paste" price: "฿2812" currency: THB in_stock: true url: https://www.desertcart.co.th/products/214989979-flex-paste-rubberized-waterproof-sealant-paste-white-half-quart-1 store_origin: TH region: Thailand --- # Fully paintable & UV resistant Waterproof & cures underwater Super thick paste fills large gaps Flex Paste Rubberized Waterproof Sealant Paste, White, Half-Quart, 1-Pack **Brand:** flex paste **Price:** ฿2812 **Availability:** ✅ In Stock ## Summary > 💪 Seal it, paint it, forget it — Flex Paste keeps your projects watertight and worry-free! ## Quick Answers - **What is this?** Flex Paste Rubberized Waterproof Sealant Paste, White, Half-Quart, 1-Pack by flex paste - **How much does it cost?** ฿2812 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/214989979-flex-paste-rubberized-waterproof-sealant-paste-white-half-quart-1) ## 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. - • **Gap-Filling Power:** Super thick paste instantly fills large cracks, holes, and gaps for durable repairs. - • **Custom Finish Ready:** Once cured, paint over it to match any surface and protect against rust and UV damage. - • **Versatile & Reliable:** Perfect for indoor/outdoor, roof, RV, marine, concrete, and DIY projects with a 1-year warranty. - • **Underwater Application:** Apply and cure even on wet surfaces or underwater—no drying wait time needed. ## Overview Flex Paste Rubberized Waterproof Sealant Paste is a thick, flexible, and durable sealant that penetrates deep to block air, water, and moisture. It uniquely cures underwater and fills large cracks and holes with a rubberized barrier that remains flexible and paintable. Ideal for a wide range of materials and projects, this American-made sealant offers UV resistance and rust prevention, making it a must-have for professional-grade repairs and DIY enthusiasts alike. ## Description Penetrates deep to seal out air, water, and moisture. Once dry, it turns into a strong, flexible, watertight, rubberized barrier. Use on: Wood, glass, tile, concrete, aluminum, metal, brick, stucco, masonry, PVC and so much more. No need to wait for surfaces to completely dry before sealing them. It even cures underwater. This thick rubberized paste is exceptional for all types of crafts, hobbies, and more. Flex Paste stays completely flexible, making it perfect for all-season roof repairs and all types of DIY projects. Flex Paste is proudly made in America, using globally sourced products. 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. ## 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 | B084TDJLKT | | Best Sellers Rank | #15,790 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #57 in Hardware Sealers | | Brand Name | Flex Paste | | Color | White | | Compatible Material | Aluminum, Ceramic, Glass, Metal, Polyvinyl Chloride, Wood | | Customer Reviews | 4.0 4.0 out of 5 stars (6,084) 4.0 out of 5 stars | | Included Components | Household Item | | Item Dimensions | 4.25 x 4.25 x 2.5 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 1 lb Jar (White) | | Item Weight | 16 ounces | | Manufacturer | Swift Response, LLC | | Material Type | Rubber | | Model | FLEX SEAL - PFSWHTR16 - WHITE | | Number Of Items | 1 | | Number Of Packs | 1 | | Part Number | PFSWHTR16 | | Style Name | 1 lb White | | Surface Recommendation | Roof | | Unit Count | 16 Ounce | | Upc | 850010226835 | | Warranty Description | 1 Year Limited | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** Flex Paste - **Item Weight:** 16 ounces - **Item dimensions L x W x H:** 4.25 x 4.25 x 2.5 inches - **Material:** Rubber - **Style:** 1 lb White ## Images ![Flex Paste Rubberized Waterproof Sealant Paste, White, Half-Quart, 1-Pack - Image 1](https://m.media-amazon.com/images/I/71-IKakfInL.jpg) ![Flex Paste Rubberized Waterproof Sealant Paste, White, Half-Quart, 1-Pack - Image 2](https://m.media-amazon.com/images/I/813DZGeMoJL.jpg) ![Flex Paste Rubberized Waterproof Sealant Paste, White, Half-Quart, 1-Pack - Image 3](https://m.media-amazon.com/images/I/7196YxAgJAL.jpg) ![Flex Paste Rubberized Waterproof Sealant Paste, White, Half-Quart, 1-Pack - Image 4](https://m.media-amazon.com/images/I/81VyKS9sU8L.jpg) ![Flex Paste Rubberized Waterproof Sealant Paste, White, Half-Quart, 1-Pack - Image 5](https://m.media-amazon.com/images/I/91-QYZY4UNL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Questions & Answers **Q: Can this be used on flexible surfaces?** A: Depends on how flexible. It has to be able to adhere to the surface. It cures the same as rubber in a tire. There is some give. **Q: Seal wet surface** A: Hello there. That's an excellent question. Flex Paste can be applied to dry or wet surfaces and even underwater. It does not dissolve, creating a watertight seal. Thank you very much for reaching out to us with your question. Please write to us anytime. We're always happy to help. Flex On! **Q: Flex seal pasta can it be used on curved surfaces?** A: Yes it can be used on any curved and even upside down surface but if ordering on-line, if you open the can and the edges are turning hard return it ASAP because chances is it's hard on bottom as-well and you don't get your money worth **Q: Can I use in a in ground swimming pool to repair a crack** A: Yes, it can be applied underwater. It won’t dissolve or wash away. It even dries underwater! Flex Paste is easy to use. With a putty knife, trowel, spatula, roller, or stiff brush remove a smooth even layer of material from the top of the tub. Scooping deeply into the tub may cause air pockets which can dry FLEX PASTE. Apply a generous amount using a smooth sweeping motion. ## 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, White, Half-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 --- ## 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.th/products/214989979-flex-paste-rubberized-waterproof-sealant-paste-white-half-quart-1](https://www.desertcart.co.th/products/214989979-flex-paste-rubberized-waterproof-sealant-paste-white-half-quart-1) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-10-27*