... effective for viscosity control and fluid loss DescriptionFCLS - Ferrochrome Lignosulfonate is a multi-purpose deflocculant, gel-strength reducer, temperature ... water, seawater, salt, lime, gyp and potassium systems FCLS has superior deflocculating capabilities, even in the presence of ... alternative alkaline material, to maintain a consistent pH. FCLS is most effective in mud systems with an alkaline ...