--- product_id: 533963658 title: "Poly Wall WindowSeal Window Flashing Tape, 4\"x100', 20mil Thickness. Waterproof, Self Adhering & Self Sealing. Strip in or Flash Straight Window Frames, Door Frames, & Other Construction Seams" brand: "polyguard" price: "€ 142.19" currency: EUR in_stock: true reviews_count: 5 category: "Polyguard" url: https://www.desertcart.gr/products/533963658-poly-wall-windowseal-window-flashing-tape-4x100-20mil-thickness-waterproof store_origin: GR region: Greece --- # 100% Waterproof Seal 4" x 100' Roll Size 20 mil Durable Thickness Poly Wall WindowSeal Window Flashing Tape, 4"x100', 20mil Thickness. Waterproof, Self Adhering & Self Sealing. Strip in or Flash Straight Window Frames, Door Frames, & Other Construction Seams **Brand:** polyguard **Price:** € 142.19 **Availability:** ✅ In Stock ## Summary > 💪 Seal it tight, build it right — the pro’s choice for flawless waterproofing! ## Quick Answers - **What is this?** Poly Wall WindowSeal Window Flashing Tape, 4"x100', 20mil Thickness. Waterproof, Self Adhering & Self Sealing. Strip in or Flash Straight Window Frames, Door Frames, & Other Construction Seams by polyguard - **How much does it cost?** € 142.19 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/533963658-poly-wall-windowseal-window-flashing-tape-4x100-20mil-thickness-waterproof) ## Best For - polyguard enthusiasts ## Why This Product - Trusted polyguard brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Versatile Compatibility:** Perfectly bonds to glass, metal, plastic, and wood for seamless construction finishing. - • **AAMA 711 Verified Quality:** Meets rigorous American Architectural Manufacturers Association standards for peace of mind. - • **Built to Flex with Your Build:** Resists cracking or tearing even with structural movement—durability you can trust. - • **Effortless Self-Adhering Power:** Peel, stick, and seal with no mess or extra tools needed. - • **Unmatched Waterproof Protection:** Creates a watertight barrier around nails and fasteners to keep moisture out. ## Overview Poly Wall WindowSeal is a premium 20 mil thick, self-adhering and self-sealing waterproof flashing tape designed for window and door frames. Laminated with polyethylene film, it provides a durable, watertight seal that resists cracking under structural movement. Verified by AAMA 711 and made in the USA, this 4" x 100' roll is compatible with multiple surfaces including glass, metal, plastic, and wood, ensuring professional-grade protection and easy application in a wide range of construction projects. ## Description Poly Wall WindowSeal Window Flashing Tape is a self-adhering, self-sealing, waterproof rubberized asphalt tape, laminated to polyethylene film. The finished product is supplied in rolls, with an easy to remove film release liner. WindowSeal is available in 20 mil thickness and a variety of roll sizes. WindowSeal Flashing Tape is used to strip in or flash straight window frames, door frames, and other construction seams. If material is to be applied to round-top or custom shaped areas, ArcFlash should be used. WindowSeal is designed to be used in ambient temperatures and surface temperatures between 40° F (5° C) and 120° F (49° C). Using Poly Wall’s Polybond Liquid Adhesive can lower the WindowSeal application temperature to 25° F (-4° C). Review: very sticky - worked great, but really sticky so careful not to let it touch itself and stick together. also make sure to push hard when rolling it on. makes it hold much better Review: Great if not in sun. - Great product, sticks pretty good however you can leave that in a sun for longer periods of time. I’ve been using this on an open project that required walls to be exposed to sun, and this tape didn’t not last. I’ve been using other brands as well and only this tape deteriorated. ## Features - Self-adhering, self-sealing, waterproof rubberized asphalt tape, laminated to polyethylene film. - Provides a smooth watertight surface around nails, staples, and fasteners. - Resists cracking or tearing if structural movement occurs. - American Architectural Manufacturers Association (AAMA) 711 verified. - Made in the USA. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BH58K76P | | Brand | POLYGUARD | | Colour | White | | Compatible Material | Glass, Metal, Plastic, Wood | | Customer Reviews | 4.4 out of 5 stars 138 Reviews | | Item Dimensions L x W x Thickness | 10.2W x 0.1Th centimetres | | Item Thickness | 20 Mils | | Manufacturer | POLYGUARD | | Manufacturer Part Number | PW.WS.4.100 | | Material | Polyethylene | | Model Number | PW.WS.4.100 | | Number of Items | 1 | | Number of items | 1 | | Other Special Features of the Product | Self Adhering, Waterproof | | Product dimensions | 10.2W x 0.1Th centimetres | | Size Name | 4" x 100' | | Special feature | Self Adhering, Waterproof | | Surface Recommendation | Glass, Metal, Plastic, Wood | | UPC | 655691510019 | | Unit Count | 30.48 meter | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** POLYGUARD - **Colour:** White - **Material:** Polyethylene - **Number of items:** 1 - **Special feature:** Self Adhering, Waterproof ## Images ![Poly Wall WindowSeal Window Flashing Tape, 4"x100', 20mil Thickness. Waterproof, Self Adhering & Self Sealing. Strip in or Flash Straight Window Frames, Door Frames, & Other Construction Seams - Image 1](https://m.media-amazon.com/images/I/61WR0zykyHL.jpg) ![Poly Wall WindowSeal Window Flashing Tape, 4"x100', 20mil Thickness. Waterproof, Self Adhering & Self Sealing. Strip in or Flash Straight Window Frames, Door Frames, & Other Construction Seams - Image 2](https://m.media-amazon.com/images/I/81H5TVDzoBL.jpg) ![Poly Wall WindowSeal Window Flashing Tape, 4"x100', 20mil Thickness. Waterproof, Self Adhering & Self Sealing. Strip in or Flash Straight Window Frames, Door Frames, & Other Construction Seams - Image 3](https://m.media-amazon.com/images/I/81GTIAVG77L.jpg) ![Poly Wall WindowSeal Window Flashing Tape, 4"x100', 20mil Thickness. Waterproof, Self Adhering & Self Sealing. Strip in or Flash Straight Window Frames, Door Frames, & Other Construction Seams - Image 4](https://m.media-amazon.com/images/I/81FaJKpWxhL.jpg) ![Poly Wall WindowSeal Window Flashing Tape, 4"x100', 20mil Thickness. Waterproof, Self Adhering & Self Sealing. Strip in or Flash Straight Window Frames, Door Frames, & Other Construction Seams - Image 5](https://m.media-amazon.com/images/I/81gxMhwCFZL.jpg) ## Questions & Answers **Q: What is the primary purpose of this flashing tape?** A: This flashing tape creates a watertight seal around windows, doors, & construction seams. It prevents water intrusion & protects against moisture buildup, ensuring durability and longevity in various construction & renovation projects. **Q: How does the tape ensure a watertight seal?** A: The tape features a rubberized asphalt coating laminated to a polyethylene film. Its self-adhering & self-sealing properties provide a smooth, waterproof barrier around nails, staples, and fasteners, effectively preventing leaks & moisture issues. **Q: What temperature range is the tape suitable for?** A: The tape is designed to perform optimally in temperatures ranging from 40°F to 120°F. It can be applied in cold conditions, down to 30°F, making it versatile for various climates & seasons. **Q: Is the tape UV resistant?** A: Yes, the tape is UV stable & can be exposed to sunlight for up to 30 days. However, to maintain its effectiveness, it should be covered or applied in areas with minimal UV exposure. **Q: What surfaces can this tape be used on?** A: This flashing tape adheres well to a variety of surfaces, including wood, vinyl, & metal. It is suitable for both indoor & outdoor applications, offering reliable protection across different materials. ## Customer Reviews ### ⭐⭐⭐⭐⭐ very sticky *by A***R on 27 July 2023* worked great, but really sticky so careful not to let it touch itself and stick together. also make sure to push hard when rolling it on. makes it hold much better ### ⭐⭐⭐⭐ Great if not in sun. *by J***K on 7 November 2024* Great product, sticks pretty good however you can leave that in a sun for longer periods of time. I’ve been using this on an open project that required walls to be exposed to sun, and this tape didn’t not last. I’ve been using other brands as well and only this tape deteriorated. ### ⭐⭐⭐⭐⭐ Good *by E***R on 16 March 2026* Works good needs to be warm to work tho ## Frequently Bought Together - POLYGUARD WindowSeal Window Flashing Tape, 20mil Thick. Waterproof, Self Adhering & Self Sealing. for Window and Door Frames (4" x 100') - Fulton Long Handle J Roller with Thick Rubber Roller 1-1/2” in Diameter by 2-7/8” Wide For Veneers Laminate Wall Coverings and Edge Banding for Maximum Pressure Adhesion - ZIP System Huber Stretch Tape | Self-Adhesive Flexible Flashing for Doors-Windows (3" x 20') --- ## 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.gr/products/533963658-poly-wall-windowseal-window-flashing-tape-4x100-20mil-thickness-waterproof](https://www.desertcart.gr/products/533963658-poly-wall-windowseal-window-flashing-tape-4x100-20mil-thickness-waterproof) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-09-06*