Flatten and level existing substrates before tile and stone installations with MAPEI® 4 to 1™ Mud Bed Mix. Constructed from a pre-blended mixture of finely graded sand and Portland cement. Great for use in floating shower bases, commercial and residential applications in dry and wet conditions. MAPEI® 4 to 1™ can be directly bonded or used as a detached floating mortar bed over a cleavage membrane or waterproof membrane. Pre-blended Sand and Cement Mortar Mix Great for flattening and leveling substrates before tile and stone installations Available in 55 pound bag For use in dry or wet areas