A non-retarding, thermally stable synthetic polymer primarily applied as a filtration control additive, anti-settling agent and compressive strength enhancer at appropriate temperatures. The polymer is exceptionally thermally stable and tested at temperatures higher than 450°F (232° C) and is ideal for lightweight cement slurries that typically portray long thickening times. The specially formulated polymer is compatible with standard additives such as retarders, dispersants and calcium chloride and is designed to handle cement compositions with salt concentrations of up to 18%.