--- product_id: 671546318 title: "Flex Caulk, Waterproof & Weatherproof Hybrid Polymer Sealant, Strong, Paintable, Indoor, Outdoor, Bath, Shower, Sink, Window, Baseboards, Door, RV, Roof, Wood, Auto & Marine, White, 4 oz, 1-Pack" brand: "flex seal" price: "€ 25.21" currency: EUR in_stock: true reviews_count: 8 category: "Flex Seal" url: https://www.desertcart.hr/products/671546318-flex-caulk-waterproof-and-weatherproof-hybrid-polymer-sealant-strong-paintable store_origin: HR region: Croatia --- # Adjustable Trigger-Flow Nozzle for precision 100% Waterproof & Weatherproof 200 PSI Tensile Strength, ultra durable Flex Caulk, Waterproof & Weatherproof Hybrid Polymer Sealant, Strong, Paintable, Indoor, Outdoor, Bath, Shower, Sink, Window, Baseboards, Door, RV, Roof, Wood, Auto & Marine, White, 4 oz, 1-Pack **Brand:** flex seal **Price:** € 25.21 **Availability:** ✅ In Stock ## Summary > 💪 Seal Strong, Stay Flexible, Look Flawless! ## Quick Answers - **What is this?** Flex Caulk, Waterproof & Weatherproof Hybrid Polymer Sealant, Strong, Paintable, Indoor, Outdoor, Bath, Shower, Sink, Window, Baseboards, Door, RV, Roof, Wood, Auto & Marine, White, 4 oz, 1-Pack by flex seal - **How much does it cost?** € 25.21 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/671546318-flex-caulk-waterproof-and-weatherproof-hybrid-polymer-sealant-strong-paintable) ## Best For - flex seal enthusiasts ## Why This Product - Trusted flex seal brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Surface Versatility:** Bonds to wet or dry surfaces, even underwater—ideal for everything from windows to marine use. - • **Ultimate Flexibility:** Hybrid polymer formula expands and contracts—no shrinking, cracking, or brittleness ever. - • **Effortless Application:** No caulk gun needed and Snap & Save cap reduces waste—caulking made simple and clean. - • **Precision Flow Control:** Dial up or down for flawless bead size every time with the adjustable trigger nozzle. - • **All-Weather Performance:** 100% waterproof, UV and chemical resistant—perfect for indoor and outdoor projects. ## Overview Flex Caulk is a professional-grade, hybrid polymer sealant designed for superior waterproofing and weatherproofing. Featuring an adjustable trigger-flow nozzle for precise application, it adheres to virtually any surface—wet or dry—and remains flexible without cracking or shrinking. UV and chemical resistant, paintable, and easy to use without a caulk gun, it’s the ultimate all-in-one solution for indoor and outdoor sealing needs. ## Description Product description Adjustable Trigger-Flow Nozzle. Lets you control the flow, so you can always “dial up” the perfect bead size. Turn it down for pinpoint precision. Crank it up for maximum coverage. Won’t shrink, crack, or become brittle. Unlike other caulks that dry out Flex Caulk’s innovative hybrid polymer formula allows it to expand and contract, and stay completely flexible. Works indoors and outdoors. Flex Caulk is 100% waterproof and weatherproof, as well as chemical and UV resistant. Plus, it’s solvent-free and virtually odorless. Clings to wet and dry surfaces. Even underwater. There’s no need to wait for surfaces to completely dry before caulking them. It even works underwater! Apply to almost any surface. Bathrooms, kitchens, sinks, showers, toilets, backsplashes, counter tops, baseboards, mouldings, pipes, skylights, windows, doors, autos, boats, and more. Made in the USA Flex Caulk is proudly made in America, using globally sourced products. DIRECTIONS Adjust the flow setting to the desired amount. Hold at a 45° angle, push trigger down, while moving the nozzle in an even motion. Remove excess caulk with a dry paper towel, do not use water. After use, secure the “Snap & Save” cap tightly on the nozzle. Review: Waterproof, flexible and easy caulking - We bought our new house with little things here and there to do. I haven't used all of one of these yet. It was so easy to use. We had a new tub put in and the plumbers caulking peeled off within a week. I saw this was flexible and waterproof. So far, it is absolutely both and staying on. Review: Easy to use - Easier to use than most caulks but still caulking itself is such a task for the inexperienced. Used this to do interior of new installed windows and it worked well, about two normal sized windows per can. ## Features - So easy to use. - No caulk gun needed. - Adjustable Trigger Flow Nozzle. - Advanced hybrid polymer formulation. - Snap & Save cap eliminates waste. - Seals out water, air, and moisture. - Adheres to virtually any surface, wet or dry. - Won’t shrink, crack, or become brittle. - UV and chemical resistant. - Fully paintable. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0DK9YCYYW | | Best Sellers Rank | #124 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Adhesive Caulk | | Brand | Flex Seal | | Brand Name | Flex Seal | | Color | White | | Customer Reviews | 4.3 out of 5 stars 67 Reviews | | Included Components | Flex Caulk, White, 4 oz, 1-Pack | | Item Form | Liquid | | Liquid Volume | 4 Fluid Ounces | | Manufacturer | Swift Response, LLC | | Material Type | Synthetic Polymer | | Model | CFSWHTR100 | | Number of Items | 1 | | Part Number | CFSWHTR100 | | Surface Recommendation | Tile | | Tensile Strength | 200 Pounds Per Square Inch | | UPC | 810129870749 | | Unit Count | 4.0 Fluid Ounces | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** Flex Seal - **Color:** White - **Item Form:** Liquid - **Liquid Volume:** 4 Fluid Ounces - **Surface Recommendation:** Tile ## Images ![Flex Caulk, Waterproof & Weatherproof Hybrid Polymer Sealant, Strong, Paintable, Indoor, Outdoor, Bath, Shower, Sink, Window, Baseboards, Door, RV, Roof, Wood, Auto & Marine, White, 4 oz, 1-Pack - Image 1](https://m.media-amazon.com/images/I/61b8JycHEQL.jpg) ![Flex Caulk, Waterproof & Weatherproof Hybrid Polymer Sealant, Strong, Paintable, Indoor, Outdoor, Bath, Shower, Sink, Window, Baseboards, Door, RV, Roof, Wood, Auto & Marine, White, 4 oz, 1-Pack - Image 2](https://m.media-amazon.com/images/I/71GZ0nOeZ1L.jpg) ![Flex Caulk, Waterproof & Weatherproof Hybrid Polymer Sealant, Strong, Paintable, Indoor, Outdoor, Bath, Shower, Sink, Window, Baseboards, Door, RV, Roof, Wood, Auto & Marine, White, 4 oz, 1-Pack - Image 3](https://m.media-amazon.com/images/I/81VALuspk5L.jpg) ![Flex Caulk, Waterproof & Weatherproof Hybrid Polymer Sealant, Strong, Paintable, Indoor, Outdoor, Bath, Shower, Sink, Window, Baseboards, Door, RV, Roof, Wood, Auto & Marine, White, 4 oz, 1-Pack - Image 4](https://m.media-amazon.com/images/I/81Qt93T3zkL.jpg) ![Flex Caulk, Waterproof & Weatherproof Hybrid Polymer Sealant, Strong, Paintable, Indoor, Outdoor, Bath, Shower, Sink, Window, Baseboards, Door, RV, Roof, Wood, Auto & Marine, White, 4 oz, 1-Pack - Image 5](https://m.media-amazon.com/images/I/918LYL9+VsL.jpg) ## Available Options This product comes in different **Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Waterproof, flexible and easy caulking *by U***N on April 14, 2026* We bought our new house with little things here and there to do. I haven't used all of one of these yet. It was so easy to use. We had a new tub put in and the plumbers caulking peeled off within a week. I saw this was flexible and waterproof. So far, it is absolutely both and staying on. ### ⭐⭐⭐⭐⭐ Easy to use *by P***Z on April 27, 2026* Easier to use than most caulks but still caulking itself is such a task for the inexperienced. Used this to do interior of new installed windows and it worked well, about two normal sized windows per can. ### ⭐⭐⭐⭐⭐ VERY PLEASED! *by C***E on April 26, 2026* Easy to use without having a caulk gun! --- ## 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.hr/products/671546318-flex-caulk-waterproof-and-weatherproof-hybrid-polymer-sealant-strong-paintable](https://www.desertcart.hr/products/671546318-flex-caulk-waterproof-and-weatherproof-hybrid-polymer-sealant-strong-paintable) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-06-22*