Hunter Panels Xci VP-SA WRB (Vapor Permeable Self Adhering Water Resistive Barrier) is a composite membrane designed for use in above-grade wall assemblies to function as a weather resistive barrier. The specially engineered breathable film is fully coated on one side with a permeable adhesive protected with a silicone release liner. The barrier will adhere firmly when pressed against the substrate and will permit the passage of water vapor while performing as a barrier to air and water.

Features and Benefits

• Compliance within numerous NFPA 285 compliant assemblies
• Fully-adhered membrane prevents water migration and air infiltration versus mechanically attached barriers
• Breathable membrane allows passage of water vapor
• Lightweight, self-adhering rolls allow for fast, easy installation
• Printed facer provides easy product identification
• No spray equipment or mil-thickness measurements required
• Compatible with Hunter Xci polyiso products, the Xci AEGIS Wall System™, and other building materials such as gypsum sheathing, concrete, and CMU.
• Surface preparation with primer or contact adhesive may be required in certain circumstances.

Installation

Install Xci Vapor Permeable Self Adhering Water Resistive Barrier in horizontal rows (preferred) or in vertical runs. Wipedust or debris from film side of product with a clean, dry rag to assist informing tight laps. Avoid forming wrinkles and air pockets. Press membrane firmly to substrate with a J-roller, especially at laps, corners and terminations. Overlap adjoining pieces of the barrier a minimum of 3". Use the barrier strips for detailing. Sequence the installation to provide shingled laps. Membrane shall bear minimum 3" onto each side of transitions such as joints,angle changes and substrate changes. Membrane shall bear 6" minimum onto adjacent membrane systems such as foundation waterproofing or roofing. Install self-adhered flashing details directly to substrate, not to the barrier. Use self-adhered flashings to wrap window openings, to treat pipe/duct penetrations and to cover expansion joints as shown in the product details. Seal termination of the barrier onto self-adhered flashings with approved termination sealant. Self-adhered flashings and termination sealants such as Aluma-Grip 701, Dow Corning 758, and Pecora AVB Silicone Sealant are compatible with Xci Vapor Permeable Self Adhering Water Resistive Barrier. Dusty conditions and installation temperatures below 40°F may require prepping laps with a contact adhesive such as CAV-GRIP.