4 to 1 Mud Bed is a pre-blended 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. Ideal for floating shower bases. Can be used from 3/8" to 3" deep.

Tile Market of Delaware sells this product at all locations in 55 lb bags.