ArdexX77 Microtec Fiber Reinforced Tile and Stone MortarARDEX X 77 MICROTEC Fiber Reinforced Tile and Stone Mortar Ideal for large format porcelain tile installations in the most demanding environments A smooth, creamy and easy to trowel polymer modified mortar formulated with MICROTEC Technology with outstanding strength, flexibility and sag resistance. ARDEX X 77 is perfect solution for the most difficult installations in any environment including large format thin tile installations. The worlds most