Mapei Mapeguard UM – 323 sq.ft.

Underlayment Membrane for Ceramic Tile and Stone

Mapeguard UM is a premium-performance, lightweight, waterproofing and vapor-pressure-equalizing underlayment membrane that provides crack suppression for use under ceramic tile and stone installations, for both residential and commercial applications. It is designed to perform over challenging substrates, such as young concrete and single-layer 3/4″ (19 mm) plywood subfloors with joist spacing of up to 19.2″ (49 cm) on center. The unique engineered tri-layered design of Mapeguard UM absorbs lateral stress from the substrate without transferring this force to the tile or stone, which maintains exceptional bonds.

Protects your tile or stone floor from cracking and water damage
Prevents transmission of in-plane substrate cracks up to 1/8-in
Use for residential and commercial applications to isolate stresses beneath the flooring associated with expansion and contraction of substrate materials
Recommended for use with polymer-modified mortars
Lightweight for easy handling and fast installation
Easy to cut with a standard utility knife
Reduced roll memory and unique tri-layer construction keep the membrane flat
Engineered cavity design allows easy single-pass filling of surface core with less mortar
Translucent membrane color shows mortar coverage under membrane