EZ-MUD® liquid polymer emulsion contains partially hydrolyzed polyacrylamide/polyacrylate (PHPA) copolymer. It is used primarily as a borehole stabilizer to help prevent reactive shale and clay from swelling and sloughing. EZ-MUD polymer is also added to low-solids drilling fluids to help increase lubricity, fluid viscosity, and to help improve carrying capacity of air/foam injection fluids.