--- product_id: 671546318 title: "Flex Caulk Hybrid Polymer Waterproof Sealant, White, 4 oz, 1-Pack" brand: "flex seal" price: "€ 32.42" currency: EUR in_stock: true reviews_count: 8 category: "Flex Seal" url: https://www.desertcart.hr/products/671546318-flex-caulk-hybrid-polymer-waterproof-sealant-white-4-oz-1 store_origin: HR region: Croatia --- # 200 psi tensile strength Waterproof sealant No caulk gun needed Flex Caulk Hybrid Polymer Waterproof Sealant, White, 4 oz, 1-Pack **Brand:** flex seal **Price:** € 32.42 **Availability:** ✅ In Stock ## Summary > 💧 Seal smart, live leak-free—because your space deserves the best! ## Quick Answers - **What is this?** Flex Caulk Hybrid Polymer Waterproof Sealant, White, 4 oz, 1-Pack by flex seal - **How much does it cost?** € 32.42 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-hybrid-polymer-waterproof-sealant-white-4-oz-1) ## 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 - • **Durability That Lasts:** Won’t shrink, crack, or become brittle—UV and chemical resistant for long-term reliability. - • **Clean & Sustainable Use:** Snap & Save cap design eliminates waste, keeping your workspace tidy and eco-conscious. - • **Ultimate Waterproof Defense:** Seals out water, air, and moisture on wet or dry surfaces—perfect for kitchens, baths, and even underwater fixes. - • **Universal Surface Compatibility:** Adheres to virtually any surface including tile, wood, metal, and more—versatility meets performance. - • **Effortless Precision Application:** Adjustable trigger flow nozzle for mess-free control—no caulk gun required. ## Overview Flex Caulk Hybrid Polymer Waterproof Sealant is a 4 oz, white, advanced hybrid polymer formula that delivers professional-grade waterproof sealing without the hassle of a caulk gun. Featuring an adjustable trigger flow nozzle, it adheres to wet or dry surfaces, resists UV and chemicals, and maintains flexibility without shrinking or cracking. Ideal for a wide range of applications from bathrooms to outdoor repairs, it’s fully paintable and designed for durability and ease of use. ## Description desertcart.com: Flex Caulk Hybrid Polymer Waterproof Sealant, White, 4 oz, 1-Pack | No caulk gun needed, trigger flow nozzle, paintable, won't shrink or crack, seals wet or dry, bath, kitchen, sink, window, RV : Industrial & Scientific Review: The Best - This is the best thing ever, used it to fix several cracks in my underground pool steps. Is there was alot of water in the pool and this stuff did what it says. It sealed perfectly, after applying we waited about an hour then put a little more since the steps were submerged in water. It has been 3 weeks and it's still good. I would highly recommend this for any sealing job with water Review: Expensive but i love this stuff and the little can is very easy to work with - If you know about flex seal than you just get it. This stuff is great ## 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 | #187 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Adhesive Caulk | | Brand | Flex Seal | | Brand Name | Flex Seal | | Color | White | | Customer Reviews | 4.0 out of 5 stars 134 Reviews | | Included Components | Flex Caulk, White, 4 oz, 1-Pack | | Item Form | Liquid | | Item Highlight | No caulk gun needed, trigger flow nozzle, paintable, won't shrink or crack, seals wet or dry, bath, kitchen, sink, window, RV | | 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 psi | | UPC | 810129870749 | | Unit Count | 4 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 Hybrid Polymer Waterproof Sealant, White, 4 oz, 1-Pack - Image 1](https://m.media-amazon.com/images/I/61b8JycHEQL.jpg) ![Flex Caulk Hybrid Polymer Waterproof Sealant, White, 4 oz, 1-Pack - Image 2](https://m.media-amazon.com/images/I/81ry5Z+vlBL.jpg) ![Flex Caulk Hybrid Polymer Waterproof Sealant, White, 4 oz, 1-Pack - Image 3](https://m.media-amazon.com/images/I/81GbA0n0YAL.jpg) ![Flex Caulk Hybrid Polymer Waterproof Sealant, White, 4 oz, 1-Pack - Image 4](https://m.media-amazon.com/images/I/81h-6OldKWL.jpg) ![Flex Caulk Hybrid Polymer Waterproof Sealant, White, 4 oz, 1-Pack - Image 5](https://m.media-amazon.com/images/I/71x6Xrp8eEL.jpg) ## Available Options This product comes in different **Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ The Best *by H***R on July 30, 2026* This is the best thing ever, used it to fix several cracks in my underground pool steps. Is there was alot of water in the pool and this stuff did what it says. It sealed perfectly, after applying we waited about an hour then put a little more since the steps were submerged in water. It has been 3 weeks and it's still good. I would highly recommend this for any sealing job with water ### ⭐⭐⭐⭐⭐ Expensive but i love this stuff and the little can is very easy to work with *by R***. on August 19, 2026* If you know about flex seal than you just get it. This stuff is great ### ⭐ Do not buy, wouldn't work, nothing came out *by C***S on August 23, 2026* Do not buy, wouldn't work, nothing came out. Looks like this is a common issue as all the 1 star reviews say same thing. Pulled the tab, moved to open position, the trigger extended like it should, pushed and the the whole top just wanted to come off, nothing was coming out. Tried several times. Past return window so I am stuck with defective product. Buy normal caulk not this. Thought it was worth the extra money for a simpler to use product, it is not. --- ## 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-hybrid-polymer-waterproof-sealant-white-4-oz-1](https://www.desertcart.hr/products/671546318-flex-caulk-hybrid-polymer-waterproof-sealant-white-4-oz-1) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-09-03*