Exterior Window Sealing Tape

We're Xiong County Xiashi Packing Co., Ltd. We've been making waterproofing materials for years. Nobody wakes up excited about tape—we get that. But when you buy a roll of our Exterior Window Sealing Tape, we promise it works. Every time. No peeling, no failing adhesives, no surprises when weather turns nasty.

We're based in China, but our products have traveled to job sites across North America, Europe, and Southeast Asia. We hold ISO9001:2015, CE, and SGS certifications, and we're recognized as a Hebei Provincial "Specialized and Sophisticated" SME. Now, let's solve your window sealing problems.

What Is Exterior Window Sealing Tape?

It's a pressure-sensitive tape that creates a watertight, airtight seal around window perimeters. Installed on the outside, over the window flange, bonded to the weather-resistant barrier (WRB) or sheathing.

Unlike duct tape or packing tape (please don't use those!), this tape handles UV rays, temperature swings, rain, wind, and aging. It stays flexible, sticks aggressively, and doesn't let go.

Common Pain Points – And How We Solve Them

We've talked to hundreds of contractors. The same complaints keep coming up. Here's what we heard—and exactly how our Exterior Window Sealing Tape was designed to fix each one.

1. Water infiltration

Water finds the smallest gaps, rots framing, damages insulation, leads to mold.

How we solve it: Our tape creates a watertight seal that stops moisture at the source. With strong acrylic or butyl-based adhesion, it bonds firmly to window flanges and WRBs, leaving no path for water to sneak through.

2. Air leaks

Drafty windows are uncomfortable and expensive, wasting heating and cooling energy.

How we solve it: Our tape delivers an airtight barrier that seals out drafts. Once applied, it stays flexible and maintains its seal year after year—so your energy bills stay low and your indoor comfort stays high.

3. Tape that fails

Peels off, turns brittle, cracks under UV exposure.

How we solve it: Our tape is UV-resistant for up to 6 months of exposure before cladding is installed. It remains flexible from -20°C to +90°C, so it won't crack in winter or soften in summer.

4. Complicated installation

Some products need primers, special tools, or perfect weather.

How we solve it: Our tape is easy to use—just clean the surface, peel, and press. No primers, no special tools, no waiting for perfect conditions. It bonds aggressively even in less-than-ideal weather.

5. Inconsistent quality

Works great one time, fails the next.

How we solve it: Every roll is ISO9001:2015 certified, SGS tested, and CE marked. Consistent quality isn't a hope—it's our promise, backed by rigorous manufacturing standards.

Bottom line: We listened to your frustrations. Then we built a tape that solves them—one roll at a time.

Where to Use Exterior Window Sealing Tape?

Use it for: new construction windows, window retrofits and replacements, door frames, curtain wall systems, prefabricated wall panels, and any rough opening where you need to stop air and water infiltration.

Anywhere a penetration meets the building envelope, good sealing tape makes all the difference.

Installation Tips

Clean the surface – remove dust, dirt, oil. Tape needs a clean, dry surface.

Cut your length – pre-cut slightly longer than needed.

Apply with firm pressure – start at one end, press as you go. Use a roller or your hand.

Overlap correctly – overlap seams by at least 2 inches (50mm), upper over lower.

Pay attention to corners – run tape continuously around corners.

Roll it again – go over the tape once more with a roller. That's it.

No special tools. Just solid technique that saves you headaches later.

Customization

We offer flexible options: widths 50mm–300mm, lengths 10m–50m, adhesive types (acrylic for heat, butyl for cold), backing materials (UV-resistant film or breathable non-woven), and OEM branding with private label. Whether you're a contractor with a specific spec or a distributor building your own brand, we can make it happen.

Exterior Window Sealing Tape is one of the smallest, cheapest, and most overlooked parts of any building project. But when it fails, the cost is anything but small. Rotted framing, mold, unhappy clients, callbacks—none of that is fun. Choose reliable tape, install it right, and you're protecting your walls, lowering energy bills, and preventing moisture problems before they start. Grab a roll. Seal those windows. Enjoy the satisfaction of a job well done. Got questions? Need a custom size? We're here to help. Just reach out.

Build well, build dry, build smart. – Xiong County Xiashi Packing Co., Ltd.