E-Z Mix Deck Mud 4:1 Supersack 3000LB PMP Deck Mud is a dry, factory blended mortar specifically designed for use by tile and masonry contractors. The product is a thoroughly blended mix of washed plaster sand and Type II/V cement. Pre-blending allows the cement to thoroughly coat the sand particles thus producing a stronger than jobsite mixing. The mortar is mixed extremely dry and then screed into place as a leveling mortar bed. The mortar bed is compatible with cement based and most water based latex adhesives. Standard mix design is 4:1. Special mix designs available.