Mapei - Mapeguard UM - Premium Underlayment Membrane for Waterproofing and Vapor Pressure Equalization - 39" x 98' 4"

Mapeguard UM is a lightweight, superior-performance waterproofing and vapor pressure equalization underlayment membrane that provides crack suppression and is suitable for use under ceramic tile and stone installations in residential and commercial applications. It is designed to perform over demanding substrates, such as young concrete and 19 mm (3/4") single-ply plywood subfloors with joists spaced up to 49 cm (19.2") on center. Mapeguard UM's unique, three-layer, engineered design absorbs lateral stresses from the substrate without transferring this force to the tile or stone, maintaining exceptional bond strength.

• Prevents the transfer of horizontal in-plane cracks up to 3 mm (1/8")
• FastTrack Ready™ – Approved for use on young (fresh) concrete and mortar screeds
• Saves time: place the membrane, then set the tiles immediately
• Hollow-out engineered design facilitates one-time filling of the surface with less mortar