Riteks RFL-4 is a High Viscosity Fluid Loss Polymer that is easily dispersed and dissolved to produce solutions of varying viscosities. Riteks RFL-4 is used as a viscosifying fluid loss additive that provides consistent results, viscosity, water retention, and suspension additive. Riteks RFL-4 is a free-flowing, granular powder that dissolves readily in water to give clear, smooth solutions, which exhibit a pseudoplastic flow behavior.