Custom Bldg Products MGMM50 Polymer Modified Mortar 50 Lb

Product Description

The CUSTOM BLDG PRODUCTS MGMM50 is a premium polymer modified dry set mortar designed for thin-set or medium bed tile installations. Formulated for large-format tile work, it handles tiles measuring 15 inches or larger on one or more sides and supports medium bed applications up to 0.75 inches thick. The non-slumping formula holds tiles in place immediately upon placement, reducing lippage and cutting down on the time spent leveling during installation. This 50-pound bag exceeds ANSI A118.4 and A118.11 standards without requiring liquid polymer additives, making it a reliable single-component solution for professional tile setters.

The MGMM50 is suited for use with natural stone, ceramic, quarry tile, cement body tile, clay pavers, brick, stone veneer, cement-based precast, and terrazzo substrates. It performs in both residential and light commercial settings where large-format or heavy stone tile is being installed on floors or walls. This mortar was formerly marketed as Marble, Granite, and Travertine Premium Mortar. Professional tile contractors and flooring installers working with demanding stone and large-format applications will find this mortar well suited to production workflows.

Key Features

• Non-slumping formula immediately holds tiles, minimizing lippage and reducing leveling time
• Medium bed capability supports installations up to 0.75 inches thick
• Rated for large-format tiles 15 inches or larger on one or more sides
• Exceeds ANSI A118.4 and A118.11 standards without liquid polymer additives
• Compatible with natural stone, ceramic, quarry, clay pavers, brick, and stone veneer
• Single-component dry set mix — no additives required

Compatibility

Designed for thin-set and medium bed installation of natural stone, ceramic, quarry tile, cement body tile, clay pavers, brick, stone veneer, cement-based precast, and terrazzo on appropriate substrates. Best suited for tiles measuring 15 inches or larger on one or more sides.

Installation Notes

Installation should be performed by a qualified tile setter following applicable TCNA guidelines and local building codes. Mix the dry set mortar with clean water only — no liquid polymer additives are needed or recommended. Substrate surfaces should be clean, flat, and free of dust, grease, or curing compounds before mortar application. Do not apply to frozen substrates or when ambient temperatures fall outside the manufacturer-recommended range.