Transitions to beams, columns, window and door frames, etc. should be made with a strip of Perm-A-Barrier® Detail Membrane, Perm-A-Barrier® Aluminum Flashing or Perm-A-Barrier® Wall Flashing. Only Perm-A-Barrier® Wall Flashing can be used for through wall flashing applications or under masonry units. Prime wood composition and gypsum sheathing with Perm-A-Barrier® WB Primer if adhesion is found to be marginal (refer to Technical Letter 12, Use on Oriented Strand Board (OSB) Roof Sheathing). Apply Perm-A-Barrier® WB Primer at a rate of 250–350 ft2/gal (6–8 m2/L). When applying PERM-A-BARRIER® Wall Flashing to PERM-A-BARRIER® Liquid, VP, VP LT or VPO, apply a bead of S100 or BITUTHENE® Liquid Membrane along all laps, seams, top edges, cuts, penetrations and as shown in GCP detail drawings, and trowel into place. If PERM-A-BARRIER® Liquid is more than 7 days old, priming may be necessary.

PERM-A-BARRIER Wall Membrane surface and ambient t® emperatures at 5°C (40°F) and above PERM-A-BARRIER Low Temperature Wall Membrane surface and ambient temperatures between 25°F (-4°C) and 60°F (16°C) ® PERM-A-BARRIER High Temperature Wall Membrane for use at in-service temperatures between 150°F (65°C) and 180°F (82°C) ® PERM-A-BARRIER Wall Flashing - heavy duty fully-adhered membrane for through-wall flashing detailing. Wall Flashing must be applied prior to the PERM-A-BARRIER VPL 50 and terminated with a bead of S100 sealant. ® ® PERM-A-BARRIER NPS Detail Membrane - primer-less flexible membrane for detail flashing areas. PERM-A-BARRIER® WALL MEMBRANE AIR AND VAPOR BARRIER INSTRUCTIONS Prior Installation, the Perm-A-Barrier ® t Surface Prep All surfaces must be structurally sound and free from spalled areas, loose aggregate, sharp protrusions or other matter that will hinder the adhesion or regular-ity of the Perm-A-Barrier® (PAB) membrane installation.