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VWFAHP Series - Acrylic Breathable Tape

A vapor-permeable acrylic tape for exterior openings, seams and transitions.

Product Overview

VWFAHP Series Acrylic Breathable Tape is an exterior airtight sealing tape designed for window and door openings in low-energy and high-performance building envelopes. It helps seal structural gaps and joints while allowing essential outward vapor diffusion from the wall assembly.

As an external breathable sealing tape, VWFAHP helps maintain airtightness and weather protection without trapping interstitial moisture. It is suitable for European low-energy window installation methods where the exterior side needs to be water-resistant, vapor-open, and durable. Customized configurations are available, including split release liners for easier installation and an optional narrow reverse-side adhesive strip for temporary frame pre-fixing.

Product Information

Product Series VWFAHP Series
Product Type Acrylic breathable tape / external window sealing tape
Material Acrylic
Typical Application Style European low-energy window installation
Primary Function Exterior airtightness, water resistance, and outward vapor diffusion
Optional Configuration Customized split release liner and optional narrow reverse-side adhesive strip for frame pre-fixing

Available Sizes

Model Specification Package
VWFAHP-10023 0.10 m × 23 m 6 rolls / ctn
VWFAHP-12023 0.12 m × 23 m 5 rolls / ctn
VWFAHP-15023 0.15 m × 23 m 4 rolls / ctn
VWFAHP-20023 0.20 m × 23 m 3 rolls / ctn

Key Benefits

  • Designed for exterior-side sealing around windows and doors

  • Allows outward vapor diffusion while maintaining airtightness

  • Helps reduce moisture accumulation around opening details

  • Supports European low-energy window installation methods

  • Improves durability of high-performance building envelope joints

  • Available with customized split release liners and an optional reverse-side adhesive strip for easier installation

Technical Data

Test Item Standard / Method Condition / Requirement Test Result
Material - - Acrylic
Basis Weight - - ≥ 200 g/m²
Thickness GB/T 328.5 (Ref. ASTM D3652) - ≥ 0.5 mm
Tensile Strength GB 23441 (Ref. EN 12311-2) - MD: ≥ 450 N/50 mm; CD: ≥ 130 N/50 mm
Elongation at Break GB 23441 (Ref. EN 12311-2) - MD: ≥ 20%; CD: ≥ 80%
180° Peel Adhesion to Aluminum Plate GB/T 2792-2014 Room temperature / 80°C / -40°C ≥ 0.4 / ≥ 0.4 / ≥ 0.4 N/mm
180° Peel Adhesion to OSB Board GB/T 2792-2014 Room temperature / 80°C / -40°C ≥ 0.4 / ≥ 0.4 / ≥ 0.4 N/mm
180° Peel Adhesion to MgO Board GB/T 2792-2014 Room temperature / 80°C / -40°C ≥ 0.4 / ≥ 0.4 / ≥ 0.4 N/mm
Water Resistance GB/T 328.10 100 cm hydrostatic head, 2 h No leakage
Water Vapor Resistance / Sd Value GB/T 17146 (Ref. EN 1931) - Sd ≤ 0.25 m
UV and Outdoor Exposure - Product should be covered after installation Up to 3 months
Application Temperature - - ≥ -20°C
Service Temperature - - -30°C to +80°C
System Note: For best long-term performance, this product should be used as part of a complete Vantell building envelope moisture management system.
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Key Applications

  • Exterior-side sealing around windows and doors
  • European low-energy window installation
  • Exterior breathable window flashing
  • Airtight and vapor-open sealing for building envelope joints
  • Moisture-safe sealing around high-performance window openings