Mapeguard UM Underlayment Membrane - 323 sq ft.
- Prevents transmission of in-plane substrate cracks up to 1/8" (3 mm).
- Recommended for use with polymer-modified mortars.
- Engineered cavity design allows easy single-pass filling of surface core with less mortar.
- Uncoupling, waterproofing and water vapor membrane up to 25 lbs. (11,3 kg) MVER and 100% relative humidity.