Ultraflex 2 is a professional-grade, single-component, high-performance, polymer-modified thin-set mortar for interior and exterior installations of ceramic, porcelain and dimensional natural-stone tile. This mortar has a high content of unique dry polymer, resulting in excellent adhesion to the substrate and tile. Ultraflex 2 meets or exceeds ANSI A118.4 and ANSI A118.11 requirements when mixed with water. Ultraflex 2 can be used for interior and exterior installations of tile in most residential floor and wall applications. In commercial applications, use on interior floor and wall installations and exterior floors.

Suitable Substrates

• Concrete (cured at least 28 days)
• Masonry cement block, brick, cement mortar beds and leveling coats
• Cement backer units (CBUs) – see manufacturer’s installation guidelines
• Gypsum wallboard – interior walls in dry areas only (See Technical Bulletin 010313-TB for priming instructions)
• APA and CANPLY Group 1 exterior-grade plywood (interior, residential and light commercial in dry conditions only)
• Properly prepared vinyl composition tile (VCT) and cutback residue (interior only)
• Properly prepared existing ceramic and porcelain tile, quarry tile and pavers (interior only)
• MAPEI waterproofing, crack-isolation and soundreduction membranes