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Tech Bulletin: Liquid-Applied Flashing Width for Sheathing Joints

PROSOCO R-Guard® FastFlash® liquid flashing noted as only approved flashing for use with DensElement™ Barrier System

PROSOCO R-Guard® FastFlash® liquid flashing is the approved flashing for use with the DensElement™ Barrier System. This system-approved flashing should be installed to cover a minimum of one inch (25 mm) on both sides of all in-plane sheathing joints to achieve a two-inch (51 mm) width of coverage. Out-of-plane sheathing joints, such as inside and outside corners, should be installed to cover a minimum of two inches (51 mm) on both sides of the joint to achieve a minimum four-inch (102 mm) width of coverage. Rough openings should also be installed to cover a minimum of two inches (51 mm) onto the face of the sheathing.

The DensElement™ Barrier System consists of three system components: DensElement™ Sheathing, PROSOCO R-Guard® FastFlash® liquid flashing and R-Guard® PorousPrep® water-based primer. When properly installed, the DensElement™ Barrier System is a vapor permeable water-resistive and air barrier (WRB-AB) when the joints, sheathing fasteners, penetrations, openings and transitions are properly sealed with PROSOCO FastFlash® liquid flashing. The system solution eliminates the need to cover the face of the sheathing with traditional WRB-AB systems, such as building wrap, fluid-applied membranes or self-adhered membranes.

For installation details and full limited warranty details, visit DensElement.com.

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