--- product_id: 527684813 title: "Rubberized Waterproof Sealant Paste, Black, Quart, 1-Pack" brand: "flex paste" price: "VT37393" currency: VUV in_stock: true reviews_count: 5 category: "Flex Paste" url: https://www.desertcart.vu/products/527684813-rubberized-waterproof-sealant-paste-black-quart-1-pack store_origin: VU region: Vanuatu --- # Fully paintable & UV resistant Works & dries underwater Super thick rubber paste fills large gaps Rubberized Waterproof Sealant Paste, Black, Quart, 1-Pack **Brand:** flex paste **Price:** VT37393 **Availability:** ✅ In Stock ## Summary > 💪 Seal it. Protect it. Flex your fix like a boss. ## Quick Answers - **What is this?** Rubberized Waterproof Sealant Paste, Black, Quart, 1-Pack by flex paste - **How much does it cost?** VT37393 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/527684813-rubberized-waterproof-sealant-paste-black-quart-1-pack) ## 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 - • **Custom Finish:** Once cured, paint over it to match any surface and protect against rust, corrosion, and UV damage. - • **Seal Like a Pro:** Penetrates deep to create 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 heavy-duty repairs. - • **Versatile & Reliable:** Perfect for indoor/outdoor projects—roof, RV, marine, concrete, and more, made proudly in the USA. - • **Underwater Application:** Apply confidently underwater—dries to a durable seal even in wet conditions. ## Overview Flex Paste Rubberized Waterproof Sealant Paste is a super thick, black rubber paste designed to fill large cracks and holes with a flexible, watertight seal. It works underwater, dries to a paintable and UV-resistant finish, and is ideal for a wide range of indoor and outdoor repair projects including roofs, RVs, concrete, and marine applications. Packaged in a freshness-locking container to maximize shelf life, this USA-made sealant combines durability with versatility for professional-grade results. ## Description Flex Paste Rubberized Waterproof Sealant Paste, Black, Quart, 1-Pack | Super thick rubber paste, fills gaps, cracks, holes, works underwater, paintable, UV resistant, walls, drywall, roof, RV : desertcart.in: Industrial & Scientific Review: Best product - I would give 5 stars for the product but having it in a tin can, it’s hard to get it out before it starts to dry (about15 minutes).The spray can is easier to use. I have used it on a lead liner around the chimney on the roof, (as water started to come in when it rained), and having box gutters, i used the whole can in the holes and after it dried, finished it with a spray can just in case i missed anything. Review: We will see - Not as easy to apply as I would have liked but if my garage doesn’t flood inthe spring it’s worth it ## 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 | #162,446 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #101 in Adhesive Caulk | | Brand | Flex Paste | | Brand Name | Flex Paste | | Colour | Black | | Compatible Material | Concrete | | Country of Publication | USA | | Customer Reviews | 4.0 out of 5 stars 1,869 Reviews | | Included Components | Household Item | | Item Dimensions | 12.7 x 10.8 x 10.8 Centimeters | | 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 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 ![Rubberized Waterproof Sealant Paste, Black, Quart, 1-Pack - 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 ### ⭐⭐⭐⭐ Best product *by M***U on 30 May 2026* I would give 5 stars for the product but having it in a tin can, it’s hard to get it out before it starts to dry (about15 minutes).The spray can is easier to use. I have used it on a lead liner around the chimney on the roof, (as water started to come in when it rained), and having box gutters, i used the whole can in the holes and after it dried, finished it with a spray can just in case i missed anything. ### ⭐⭐⭐⭐⭐ We will see *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 ### ⭐⭐⭐⭐⭐ Flex paste *by F***D on 21 December 2020* Super great stuff works really great for sealing up stuff ....a little on the pricey side tho ## 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.vu/products/527684813-rubberized-waterproof-sealant-paste-black-quart-1-pack](https://www.desertcart.vu/products/527684813-rubberized-waterproof-sealant-paste-black-quart-1-pack) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-09-25*