---
product_id: 482619718
title: "WindowSeal Window and Door Flashing Tape, 4 in x 100 ft Roll, 20 mil Thick, Self-Sealing & Self-Adhering Waterproof Barrier"
brand: "polyguard"
price: "€ 87.98"
currency: EUR
in_stock: true
reviews_count: 8
category: "Polyguard"
url: https://www.desertcart.hr/products/482619718-windowseal-window-and-door-flashing-tape-4-in-x-100
store_origin: HR
region: Croatia
---

# 20 mil waterproof thickness Works from 40°F to 120°F Self-adhering & nail-sealable WindowSeal Window and Door Flashing Tape, 4 in x 100 ft Roll, 20 mil Thick, Self-Sealing & Self-Adhering Waterproof Barrier

**Brand:** polyguard
**Price:** € 87.98
**Availability:** ✅ In Stock

## Summary

> 💪 Seal it once, seal it right — the ultimate waterproof shield for your windows and doors!

## Quick Answers

- **What is this?** WindowSeal Window and Door Flashing Tape, 4 in x 100 ft Roll, 20 mil Thick, Self-Sealing & Self-Adhering Waterproof Barrier by polyguard
- **How much does it cost?** € 87.98 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/482619718-windowseal-window-and-door-flashing-tape-4-in-x-100)

## 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

- • **Climate-Ready Durability:** Performs flawlessly in extreme temps from chilly 40°F to scorching 120°F—install with confidence year-round.
- • **Effortless Self-Adhesion:** Peel-and-stick application saves time and guarantees a perfect seal on windows, doors, and seams.
- • **Bulletproof Waterproofing:** 20 mil thick rubberized asphalt core ensures a watertight seal that stands up to the harshest weather.
- • **Nail & Staple Sealability:** Creates a smooth, crack-resistant barrier around fasteners to prevent leaks and structural damage.
- • **Flexible Fit for Any Frame:** Conforms seamlessly to irregular shapes and porous surfaces, making every installation look pro-level.

## Overview

POLYGUARD WindowSeal is a 4-inch by 100-foot roll of 20 mil thick, self-adhering flashing tape designed to create a durable, waterproof barrier around windows and doors. Engineered with a rubberized asphalt core and polyethylene backing, it performs reliably in temperatures from 40°F to 120°F, resists tearing, and seals tightly around nails and fasteners. AAMA 711 compliant and made in the USA, it’s the professional’s choice for weatherproofing and long-lasting protection.

## Description

Product description Versatile 20 Mil Flashing Tape for All Your Sealing Needs Discover the ultimate solution for sealing windows, doors, & construction seams with PolyGuard Flashing Tape. This self-adhering, self-sealing tape features a rubberized asphalt coating laminated to polyethylene film, ensuring a waterproof & durable barrier. Providing a seamless, long-lasting seal. What is the primary purpose of this flashing tape? 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. What is the primary purpose of this flashing tape? 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. How does the tape ensure a watertight seal? 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. How does the tape ensure a watertight seal? 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. What temperature range is the tape suitable for? 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. What temperature range is the tape suitable for? 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. Is the tape UV resistant? 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. Is the tape UV resistant? 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. What surfaces can this tape be used on? 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. What surfaces can this tape be used on? 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. Peel & Stick for Easy Application The peel-and-stick application with an easy-release liner makes installation clean and simple, reducing mess and speeding up the process for any project. Peel & Stick for Easy Application The peel-and-stick application with an easy-release liner makes installation clean and simple, reducing mess and speeding up the process for any project. Complete Waterproof Seal Provides a watertight barrier that prevents water intrusion, ensuring your project stays protected from moisture damage in all conditions. Complete Waterproof Seal Provides a watertight barrier that prevents water intrusion, ensuring your project stays protected from moisture damage in all conditions. AAMA 711 Quality Certified Polyguard's WindowSeal Flashing tape meets AAMA 711 standards, guaranteeing high quality and reliable performance. Trust in a product verified by industry-leading specifications. AAMA 711 Quality Certified Polyguard's WindowSeal Flashing tape meets AAMA 711 standards, guaranteeing high quality and reliable performance. Trust in a product verified by industry-leading specifications. Versatile Temperature Range Our tape performs reliably across a 30°F-120°F range, ensuring strong adhesion in any climate. The broad temperature flexibility allows consistent application and durability in all weather conditions. Versatile Temperature Range Our tape performs reliably across a 30°F-120°F range, ensuring strong adhesion in any climate. The broad temperature flexibility allows consistent application and durability in all weather conditions. Unmatched Strength & Durability Engineered for strength, our tape features superior adhesion that ensures a secure bond to various surfaces, creating a robust seal. It delivers exceptional performance even under extreme conditions. Unmatched Strength & Durability Engineered for strength, our tape features superior adhesion that ensures a secure bond to various surfaces, creating a robust seal. It delivers exceptional performance even under extreme conditions. Exceptional Flexibility & Adaptability Our tape’s advanced flexibility allows it to conform seamlessly to irregular surfaces & movements. It resists cracking & tearing even under structural shifts, ensuring a long-lasting, reliable seal. Exceptional Flexibility & Adaptability Our tape’s advanced flexibility allows it to conform seamlessly to irregular surfaces & movements. It resists cracking & tearing even under structural shifts, ensuring a long-lasting, reliable seal. PolyGuard Flashing Asphalt Window Flashing Strong Adhesion Self-Sealing Yes Temperature Range 40°F - 120°F UV Resistance N/A Application Type Surface Application Available Sizes 100’x4",6",8",12" Quantity: 1, 3 & 4 Roll Packs Learn More Asphalt Window Flashing Strong Adhesion Self-Sealing Yes Temperature Range 40°F - 120°F UV Resistance N/A Application Type Surface Application Available Sizes 100’x4",6",8",12" Quantity 1, 3 & 4 Roll Packs Butyl Window Flashing Strong Adhesion Self-Sealing Yes Temperature Range 15°F-240°F UV Resistance 120 Days Application Type Surface Application Available Sizes 100’x4”, 6”, 9”, 12 Quantity: 1,3 & 4 Roll Packs Learn More Butyl Window Flashing 15°F-240°F 120 Days 100’x4”, 6”, 9”, 12 1,3 & 4 Roll Packs Liquid Flashing Strong Adhesion Self-Sealing Not Applicable Temperature Range Not Applicable UV Resistance 9 Months Application Type Filling and Bonding Available Sizes 20oz. sausage tubes Quantity: 2,3,12 Pack Learn More Liquid Flashing Not Applicable 9 Months Filling and Bonding 20oz. sausage tubes 2,3,12 Pack Complete Your Home with PolyGuard! Enhance your home’s longevity with Polyguard's high-performance solutions! Blue Barrier Liquid Flashing: Ultimate Sealing! Butyl Flashing Tape: Waterproof & Self-Sealing Termite Barrier Flashing: Non-Chemical Protection Roof Underlayment: High-Temp, Self-Sealing RotShield Joist Tape: Self-Sealing Deck Protection Advanced protection with Blue Barrier Liquid Wrap Seal your windows & doors with Polyguard Blue Barrier Liquid Flashing. This weather-resistant, high-adhesion sealant ensures a durable, airtight barrier. It is easy to apply, low VOC, & UV resistant. Ensure a watertight seal with PolyGuard Butyl Flashing Tape. This 4" x 100' self-adhering tape works in temps down to 15°F, providing superior waterproofing & adhesion for all construction seams. Protect your home with Termite Barrier Flashing. This self-adhesive roll shields against termites & moisture, effective down to 30°F, with a high-density polyethylene film bonded to 36mil sealant. Protect your roof with Deckguard HT Underlayment. This 40-mil, self-sealing membrane withstands up to 260°F, offering superior waterproofing & leak resistance around nails & roof features. Protect your deck with Rot Shield Joist Tape. This 4" x 100' self-adhering tape prevents rot and moisture build-up, enhancing deck longevity. Easy to apply, camouflages well, and works in cold temps. A low-VOC liquid membrane designed to provide exceptional air and moisture barrier capabilities. This versatile product ensures a fully adhered barrier that enhances durability in building projects. Explore a range of top-notch sealing solutions in action! Polyguard products provide superior protection, ensuring durability & reliability for your home. From windows & roofs to decks, see how self-sealing & self-adhesive options excel in various weather conditions.

Review: Highly recommend! - Polyguard Poly Wall WindowSeal Flashing Tape is an absolute must-have for any construction or renovation project! The 6" x 100' roll provides ample coverage, and the 20mil thickness feels incredibly robust and durable. It's truly waterproof, self-adhering, and self-sealing, making installation a breeze and giving me complete confidence in its protection for window and door frames. This tape is top-notch for ensuring a tight, waterproof seal!
Review: Very well made and sticky - This is for a retro window install of 5 replacement windows on a seasonal property that is sheathed with Plywood and T1-11 type siding. will be installed in Spring of 25026

## Features

- Waterproof Seal: Self-adhering design creates a watertight barrier for windows, doors, and seams
- Versatile Application: Ideal for flashing straight window frames, door frames, and construction seams
- Cold & Hot Climate Ready: Performs in temperatures from 40° F to 120° F; store in warm space before cold-weather installs
- Flexible Installation: Conforms to irregular shapes and uneven, porous substrates
- Nail Sealability: Forms a smooth, sealed surface around nails, staples, and fasteners
- Tear-Resistant Performance: Resists cracking and tearing from structural movement or extreme weather
- Verified Quality: AAMA 711 compliant; made in the USA for dependable building performance
- Rubberized Asphalt Construction: Features a self-adhering rubberized asphalt core with polyethylene backing for superior adhesion and durability

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BH58K76P |
| Adhesive Format | Wide Roll |
| Adhesive Location | Single Sided |
| Adhesive Side Count | 1 |
| Brand | POLYGUARD |
| Brand Name | POLYGUARD |
| Color | White |
| Compatible Material | Wood |
| Customer Reviews | 4.3 out of 5 stars 201 Reviews |
| Foil Thickness | 20 Mils |
| Included Components | 1-Polyguard WindowSeal 4" x 100' Flashing Tape |
| Item Dimensions L x W x Thickness | 4"W |
| Item Resistance | waterproof |
| Item Thickness | 20 Mils |
| Lower Temperature Rating | 40 Degrees Fahrenheit |
| Manufacturer | POLYGUARD |
| Material | Polyethylene |
| Material Type | Polyethylene |
| Model | PW.WS.4.100 |
| Number of Items | 1 |
| Other Special Features of the Product | Waterproof |
| Part Number | PW.WS.4.100 |
| Recommended Uses For Product | Indoor, Outdoor |
| Size Name | 4" x 100' |
| Special Feature | Waterproof |
| Surface Recommendation | Wood, Vinyl, Metal |
| UPC | 655691510019 |
| Unit Count | 100.0 Feet |
| Upper Temperature Rating | 120 Degrees Fahrenheit |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** POLYGUARD
- **Color:** White
- **Material:** Polyethylene
- **Number of Items:** 1
- **Recommended Uses For Product:** Indoor, Outdoor

## Images

![WindowSeal Window and Door Flashing Tape, 4 in x 100 ft Roll, 20 mil Thick, Self-Sealing & Self-Adhering Waterproof Barrier - Image 1](https://m.media-amazon.com/images/I/61WR0zykyHL.jpg)

## Available Options

This product comes in different **Size, Item Package Quantity** options.

## 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

### ⭐⭐⭐⭐⭐ Highly recommend!
*by J***I on July 29, 2025*

Polyguard Poly Wall WindowSeal Flashing Tape is an absolute must-have for any construction or renovation project! The 6" x 100' roll provides ample coverage, and the 20mil thickness feels incredibly robust and durable. It's truly waterproof, self-adhering, and self-sealing, making installation a breeze and giving me complete confidence in its protection for window and door frames. This tape is top-notch for ensuring a tight, waterproof seal!

### ⭐⭐⭐⭐⭐ Very well made and sticky
*by C***. on February 8, 2026*

This is for a retro window install of 5 replacement windows on a seasonal property that is sheathed with Plywood and T1-11 type siding. will be installed in Spring of 25026

### ⭐⭐⭐⭐ Polyguard window/door seal
*by J***Y on October 5, 2023*

Liked the product when it was cool out, but the slightest time in the sun and it gets very hard to work with. Has a tendency the roll over on itself even though only short lengths of backing removed at a time. Possibly due to the fact that the cut edge on one side of the roll kept sticking while trying to unwind it.

## 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')

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-06-24*