Installation Guide

1. The substrate must be clean, even, and load bearing. The thin-set mortar used for bonding the WP

must be appropriate for the substrate, and it must penetrate and engage the WP fleece. We

recommend using a modified thin-set mortar to install the WP to the vertical substrate. Cut the WP to

size prior to application.

2. Apply thin-set mortar to the substrate using a 1/4" x 3/16" (6 x 5 mm) V-notch trowel. Press the WP

fully into the bond coat. Work the WP into the mortar by applying pressure to the membrane with the

flat side of the trowel (held at an angle) in smooth, diagonal sweeps. ALL air bubbles must be

removed.

3. Seams can be constructed by overlapping the edges of the WP 2" (5 cm) using unmodified or

modified thin-set mortar, or by abutting the edges and covering the joint with Seam Tape using an

unmodified or modified thin-set mortar.

4. For inside and outside corners, adhere pre-formed WP Inside and Outside Corners. For floor/wall

connections, use Seam Tape. Install Pipe Collars at showerhead, body sprays, etc. and Mixing Valve

Collar at the mixing valve. As an alternative to the Pipe Collars and Mixing Valve Collars, other

suitable sealants can be used to seal pipe protrusions and protect moisture sensitive solid backing

panels at the mixing valve.

5. Once the entire membrane—with seams, corners, and connections—has been completely bonded,

and therefore waterproofed, the tile/stone may be applied.

Note: Water testing of the assembly

Prior to setting tile, wait 24 hours to allow for final set of the mortar before testing to ensure

waterproof performance of the assembly at seams and connections.

6. For tile installations using the thin-bed method, apply unmodified or modified thin-set mortar

directly to the exposed WP surface and install the tiles, ensuring full coverage. For acid-resistant

coverings, use an epoxy adhesive to set and grout the tile.

Waterproofing Membrane

with VaporShield Technology ™

Dural USA Inc.

711 N Varnell Rd

Tunnel Hill, GA 30755

1-800-278-1956

mail@duralusa.us

www.dural.com

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Waterproofing Membrane with VaporShield Technology ™ 1. The substrate must be clean, even, and load bearing. The thin-set mortar used for bonding the WP must be appropriate for the substrate, and it must penetrate and engage the WP fleece. We recommend using a modified thin-set mortar to install the WP to the vertical substrate. Cut the WP to size prior to application. 2. Apply thin-set mortar to the substrate using a 1/4" x 3/16" (6 x 5 mm) V-notch trowel. Press the WP fully into the bond coat.