PAC KING Window Flashing Tape System
Window and door joints are universally recognized as the weakest links in building airtightness. The PAC KING Window Flashing Tape System provides a comprehensive, professional gap sealing solution that strictly secures the watertight and airtight integrity of these critical structural nodes.
Complete 3-Part Sealing Solution
Engineered for seamless integration, all tapes feature high-tack formulations evaluated strictly by adhesive coating weight (g/m² or gsm) for superior, long-lasting bonding. We manufacture actionable production sizes ranging from 10mm to 300mm in width, with exactly 30m in length per roll.
Indoor Waterproof Vapor Barrier Tape
Applied to the interior side (warm side) of the window opening. It definitively blocks indoor moisture and water vapor from penetrating the structural gap, stopping internal condensation before it begins.
Outdoor Waterproof Breathable Tape
Applied to the exterior side (cold side). It acts as a robust shield against wind-driven rain while simultaneously allowing any trapped moisture inside the gap to safely vent outward.
Reflective Vapor Barrier Tape
A specialized dual-purpose membrane combining excellent vapor blocking with thermal reflection capabilities. Essential for node sealing in environments with demanding thermal requirements.
Installation Standards & Application Guidelines
Following precise geometric and material guidelines is mandatory to guarantee node performance over the lifespan of the building.
| Self-Adhesive Bonding | The backing utilizes a high-tack formulation optimized by precise gsm coating weights. It delivers exceptional water resistance, weatherability, and anti-aging properties. Simply peel the release liner for rapid application. |
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| Primer for Rough Surfaces | When working with unpolished or rough concrete walls, it is highly recommended to apply a dedicated primer first. This stabilizes the cementitious base and dramatically increases the ultimate bonding strength of the tape. |
| Standard Overlap Requirement | To ensure the absolute continuity of the waterproofing barrier, the overlap length between two tape segments must be strictly maintained at no less than 10cm. |
| Corner Treatment (Node Detailing) | Proper detailing at the four corners of doors and windows is the key to preventing leaks. The width of the corner flashing tape should be sized at 1.0 to 1.5 times the gap width between the main frame and the rough opening to ensure total coverage. |
Frequently Asked Questions
Why do I need separate tapes for the inside and outside of the window?
This utilizes the "Inner-Tight, Outer-Permeable" principle required by modern Passive House standards. The indoor tape blocks warm vapor from entering the gap, while the outdoor tape blocks rain but remains breathable so trapped moisture can escape.
What are the available dimensions for these tapes?
We manufacture fully customizable formats to suit different gap sizes. The actionable production limits range from 10mm to 300mm in width, with every roll precisely cut to 30m in length.
Evaluate the Complete System on Your Next Project
We provide complimentary sample kits for rigorous B2B testing. To qualify for free international product samples, please include your estimated monthly and annual consumption volumes in your inquiry. Our engineering team will review your usage to assign the most competitive factory-direct pricing tier.
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