Which materials are considered specialized mortars in section 118?

The correct choice of fast setting latex portland cement as a specialized mortar in section 118 is based on its specific properties and applications. Specialized mortars are designed for particular needs within tile installation, and fast setting latex portland cement is notable for its rapid curing time and enhanced adhesion properties, making it particularly suitable for installations that require quick turnaround.

This type of mortar is often used in areas where minimizing downtime is critical, such as during renovations or repairs. Its formulation allows it to bond effectively while also accommodating slight movements in tiled surfaces, which is essential for maintaining the integrity of the installation over time.

Other materials, while important in tiling practices, do not fit the specialized classification in the context of section 118. Thin set mortar is a common product but is not classified as specialized; it is typically used for general tile installation. Polyester adhesive, while useful for certain bonding applications, is not categorized under specialized mortars as defined in industry standards. Joint filler is used for finishing and sealing gaps between tiles rather than for setting tiles themselves, which distinguishes it from mortars used in the initial installation process.