FCLS is an excellent all-purpose deflocculant and fluid-loss-control agent. It is effective for viscosity control and fluid loss reduction in all water-base mud systems, including freshwater, brackish water, seawater, salt, lime, gyp and potassium systems.

FCLS has superior deflocculating capabilities, even in the presence of contaminants and elevated temperatures.

Due to the product's low pH, treatments require additional caustic soda or an alternative alkaline material, to maintain a consistent pH. FCLS is most effective in mud systems with an alkaline pH in the range of 9 to 11.