GCP PERM-A-BARRIER® Wall Flashing

SELF-ADHERING, RUBBERIZED ASPHALT FLASHING FOR CAVITY WALL MOISTURE PROTECTION

PERM-A-BARRIER® Wall Flashing is a high-performance through-wall flashing that creates a watertight barrier while allowing for fast, clean installation. Its rubberized asphalt and cross-laminated film construction offers superior durability, flexibility, and dimensional stability, making it ideal for cavity wall applications where water and air infiltration must be minimized.

FEATURES

• Fully bonded system: Creates continuous adhesion to the substrate, preventing water tracking and wind uplift.

• Waterproof and vapor impermeable: Blocks both liquid water and vapor to protect the building envelope.

• Cold-applied application: Eliminates open flame risk with peel-and-stick simplicity.

• RIPCORD® split release liner: Speeds up detailing in corners and complex transitions.

• Tear- and puncture-resistant: Cross-laminated film provides high strength and durability.

• Green jobsite visibility: Easily identified on-site for quality control and inspection.

PACKAGING

• Available in multiple widths: 18" and 24" rolls

• Roll length: 75 feet

NOTE

• This product is sold in individual rolls. 
• Always apply to clean, dry, primed surfaces. Use in conjunction with PERM-A-BARRIER® primer and detail tape for full system performance.

RESOURCES

• Technical Data Sheet