Mapei 4 to 1 Mortar Mix 55lb Mud Bed (Dry Pack)

4 to 1 is a preblended mixture of finely graded sand and Portland cement used for thick-bed mortar installations.  4 to 1  flattens and levels an existing substrate before the installation of tile and stone.

• Screed and level from 3/8″ to 3″ (10 mm to 7.5 cm)
• Ideal for floating shower bases
• Mix with water or Planicrete® AC