Tile & Stone Installation Systems
Mud Beds, Render Mortars and Repair Systems
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Related references
4 to 1™ Mud Bed Mix
Technical Data Sheet
English (Usa)
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Safety Data Sheet
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Sand and cement mortar mix

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.
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MAPEI Corporation