Mapei Mapeguard UM Underlayment Membrane - 54 sq. ft.

Versatile Performance: Mapeguard UM serves as an uncoupling mat, waterproofing membrane, and vapor-pressure-equalizing underlayment, making it suitable for various applications.

Crack Prevention: This membrane prevents the transmission of in-plane substrate cracks up to 1/8" (3 mm), ensuring a stable and durable tile or stone installation.

Fast Track Ready: Approved for use over young (green) concrete and mortar beds, allowing for immediate tile installation after embedding the membrane.

Engineered Design: The tri-layered design absorbs lateral stress from the substrate, maintaining exceptional bonds and providing compression resistance for rolling loads.

User-Friendly: Easy to cut with a standard utility knife, the membrane's unique features, including reduced "roll memory" and visible chalk and laser lines, contribute to a hassle-free installation process.