Blok-Flash delivers the surest, most cost-effective control of moisture and mold-growth in exterior single-wythe CMU wall systems. It provides 10 times greater bond at the exterior bed-joint than a membrane through-wall system, with no water penetration, no by-pass, and rapid expulsion of moisture.

Blok-Flash is a tough, lightweight, embeddable flashing system, suitable for use at all flashing/ weep vent locations, including base of wall, above door and window openings, above bond beams, in parapet walls, and wherever flashing is necessary.

When moisture infiltrates the wall and flows down the vertical cores, Blok-Flash intercepts it and diverts it to the exterior, quickly and effectively. Mortar Net 800-664-6638.