Curasta® Gypsum retarder is a high-performance and environmentally friendly protein-based retarder.Curasta®Gypsum retarders are widely used in gypsum based products, especially for gypsum plaster, gypsum binders, gypsum putty, gypsum precast etc. Curasta® Gypsum retarder can help adjust the setting time to meet the specific product and job needs and allow for proper application and finishing.